How to Guess a Korean's Age by Their Name: 80 Years of Naming Trends

At the Jongno 3-ga underground shopping arcade, a woman selling clothes calls out to the shop next door. “Yeong-ja (영자), got some change?” That same evening, across town at a cafe in Seongsu-dong, a young mother pushing a stroller tells her child, “Seo-ah (서아), don’t touch that.”

Same city, same day. Sixty years between those two names.

Live in Korea long enough and you develop a strange sixth sense. You hear a name and, before you see a face, an approximate age pops into your head. Koreans don’t learn this formally. They just know. The name Sun-ja (순자) automatically conjures a grandmother; Do-yun (도윤) brings up a little boy with a preschool backpack.

Why does this happen? Because Korean naming trends change faster and more completely than in most countries. There’s no Korean equivalent of James or Michael—names that span generations. In Korea, when a generation passes, the entire menu of names gets swapped out.

How Two Syllables Reveal a Generation

The Supreme Court of Korea has compiled statistics from every birth registration since the 1940s. Here are the number-one names by decade.

📇 Most Popular Names by Decade (based on Supreme Court birth registration data; 2010s data covers up to 2015)

Over the full 80-year span, the most-used names of all were Ji-hun (지훈) for boys and Yeong-suk (영숙) for girls. Their peak decades are more than 30 years apart—two champions from entirely different worlds inside the same country.

Yeong-ja, Sun-ja, Jeong-ja — Why So Many?

Short answer first: it’s a remnant of the Japanese occupation.

The Japanese feminine suffix 子 (-ko) crossed over during the colonial period. Names like Yōko, Yukiko, and Keiko, when read with their Korean hanja pronunciations, became Yang-ja (양자), Seol-ja (설자), and Gyu-ja (규자). The practice spread rapidly through the name-change policy enforced during the occupation, and the habit persisted long after liberation. Even among women born in the early 1970s, you’ll still find Mi-ja (미자), Suk-ja (숙자), and Yeong-ja (영자).

The names of the postwar generation carry a particular weight. Yeong (永) means “to live long.” Suk (淑) means “chaste and virtuous.” Sun (順) means “obedient and gentle.” These were names from an era when a child’s survival was not something you took for granted. In the 1960s, Mi (美), meaning “beauty,” entered the charts—Mi-suk (미숙), Mi-gyeong (미경), Mi-yeong (미영). The shift from survival to beauty: that was the first signal of change.

What Changed in the 1970s and 80s?

The -ja (자) suffix disappeared, and two-syllable names got sleek.

The top girls’ name of the 1970s was Eun-ju (은주), followed by Eun-jeong (은정), Mi-yeong (미영), and Eun-yeong (은영). These names sound softer, with meaning beginning to yield ground to phonetics. On the boys’ side, Jeong-hun (정훈) rose to the top. Around this time, the center of gravity in Korean naming shifted from clan rules to parental taste. It was also the generation that moved into apartment complexes and grew apart from their cousins.

And then, in the 1980s, the strangest and most beautiful thing in the history of Korean naming happened: the rise of pure Korean names (순우리말 이름).

These are names built from native Korean words, with no Chinese characters at all: Areum (아름, “beauty”), Seulgi (슬기, “wisdom”), Hanbyeol (한별, “one star”), Dasom (다솜, “love”), Haneul (하늘, “sky”), Hangyeol (한결, “constancy”). The 1980s were a time of student-led resistance against the dictatorship and foreign influence, and the “reclaim what’s ours” sentiment trickled all the way down to newborn name tags. The top pure Korean girls’ name of the 1980s was Areum (아름); in the 1990s, Seulgi (슬기); in the 2000s, Haneul (하늘). For boys, Hansol (한솔) and Hangyeol (한결) held on for years.

Pure Korean names didn’t end as a fad—they quietly survived. The 2025 rankings still include names like Yunseul (윤슬, “sunlight shimmering on water”), Isol (이솔), and Roun (로운). Though today’s versions have a different flavor from the 1980s ones. Back then, a pure Korean name was a statement. Now it’s a preference.

When Every Classroom Was Full of Ji-huns and Ji-hyes

In the 1980s and 1990s, the number-one boys’ name was Ji-hun (지훈) for two decades straight. The girls’ top spot shifted from Ji-hye (지혜) to Yu-jin (유진).

This generation’s classrooms were a hellscape of duplicate names. Three Ji-huns in one class meant sorting them by surname—Kim Ji-hun, Lee Ji-hun, Park Ji-hun—or by size: Big Ji-hun, Little Ji-hun. The surname didn’t help much either. 21.5% of Koreans are Kim, 14.7% are Lee, and 8.4% are Park. The top three surnames alone cover 44% of the population. A common surname plus a common given name: the outcome was inevitable.

Most Koreans currently in their 30s and 40s—the working core of the country—belong to this generation. If you see Ji-hun (지훈), Ji-yeong (지영), Hyeon-u (현우), or Min-ji (민지) on a hotel name tag, a business card, or a hospital reception screen, the person was almost certainly born between 1985 and 1998.

Where Did Min-jun and Seo-yeon Come From?

The 2000s flipped the board again. Min-jun (민준) was a name that had never cracked the top 20 before the 1990s—and then it dominated the 2000s and 2010s outright. Seo-yeon (서연) climbed from #2 in the 2000s to #1 in the 2010s.

What these names share is their mouthfeel. Min-jun, Seo-jun, Ha-jun, Seo-yeon, Seo-yun, Ji-u (민준, 서준, 하준, 서연, 서윤, 지우)—no harsh consonants anywhere. Parents still visited naming centers to tally up hanja stroke counts, but the actual selection was increasingly driven by sound. This was also the moment when K-drama character names began shaking up the rankings.

For travelers, this is the generation you’ll encounter most. The café barista, the convenience store night-shift worker, the guesthouse staff near a university. The name tags of Koreans in their early-to-mid twenties almost always carry a Jun (준) or a Yeon (연).

The Names Called Out at Kindergarten Gates Right Now

According to 2025 birth registration data, the top boys’ name is Do-yun (도윤) and the top girls’ name is Seo-ah (서아). Longtime champion I-jun (이준) has stepped aside.

🍼 Top 10 Newborn Names of 2025 (based on Namechart data)

Read the list out loud and the pattern snaps into focus. Almost no batchim (final consonants). The ending syllables converge on -a (아), -yun (윤), -rin (린), -u (우), -jun (준). And the gender line is dissolving—even Koreans sometimes can’t tell from the name alone. I-an (이안), Ji-an (지안), Ji-u (지우), and I-hyeon (이현) appear on both the boys’ and girls’ lists.

Three forces seem to be at work. First, more parents want names that are easy to pronounce in English-speaking countries—names chosen partly with study abroad or overseas careers in mind. Second, there’s a growing resistance to locking gender into a name. Third, sound now leads meaning. Even at the naming center, parents increasingly pick the phonetics first and fit the hanja around it afterward.

A generation ago, a name was a sentence about who you hoped your child would become. Today, it’s closer to a sound you want them to be called by.

What If You Don’t Like Your Name?

You change it. Korea’s name-change process is relatively open. You file a petition with the family court, state your reasons, and the approval rate is high.

The most common reason given: your name feels dated to the point of social discomfort. Names ending in -ja (자) or -sun (순) are the textbook cases. Women file for name changes noticeably more than men. They weren’t bound by hangnyeolja, so they took the full force of each decade’s trends head-on.

The upshot: in Korea, names are more fluid than you might think. There’s a decent chance the name on someone’s business card isn’t the one they were born with. Nobody finds this strange.

How Travelers Can Put This to Use

A Name Tells You What Its Era Feared

Yeong-ja (영자) and Sun-ja (순자) carried a wish for survival. Mi-suk (미숙) and Mi-gyeong (미경) held a hope for beauty. Ji-hun (지훈) and Ji-hye (지혜) were weighted with the expectation of wisdom. Min-jun (민준) and Seo-yeon (서연) came from a desire for a name that would sound pleasant anywhere. Do-yun (도윤) and Seo-ah (서아) feel like a gift of pure sound—a name chosen for how it rings in the air.

Eighty years of Korea are written on its name tags. Next time someone in Seoul tells you their name, take half a second to look at those two syllables. You’ll see their age. You’ll see something about the era their parents lived through.