Female and male first names : Irish.

Jathen is an uncommon boy's name with uncertain origins, possibly derived from Hebrew Jesse meaning "wealthy" or Irish Seathan meaning "wisdom", though these connections lack definitive proof. Its unique sound has contributed to its recent popularity despite its unclear history and various spellings.

Javeion is an African-American originated name, created by blending Javon (meaning "God is gracious") and Kevin (meaning "kind, gentle, handsome"), signifying "gracious and kind".

Jaycee is a modern female name derived from the combination of 'Joyce' (meaning happy or joyful) and 'Lee', popularized in mid-20th century, carrying connotations of happiness, strength, and independence.

Jaycian is a recently coined name inspired by the English "Jay" and Irish "Cian", meaning 'ancient', gaining popularity as a unique modern option without specific historical significance.

Jaydn is a modern American name believed to combine "Jade" and "Ydn", with possible links to the Irish name Declan. Its meaning is unclear but often associated with darkness or goodness. Despite its uncertainty, Jaydn has gained popularity among parents seeking unique names, particularly for its unisex appeal.

Jaymee is a unique and charming name of unknown origin and meaning, likely invented by parents seeking a distinctive name for their child.

Jaymian is an American male name derived from Jameson, which means "supplanter" or "successor".

Jayshawn is a unique African-American name combining 'Jay' (intelligence, grace) and 'Shawn' (God's favor), popularized by celebrities like JAY-Z and Jayson Tatum since the 1980s.

Jayvaughn is an American-made male name combining 'Jay' from John Jay, a founding father, with 'Vaughan', honoring Irish-American politician Samuel Vaughan.

Jenard is an uncommon name with unclear origins, possibly Hebrew, Scottish, or Irish, and meanings ranging from 'song of the sea' to 'bold power'. It gained popularity in recent years, partly due to its appearance in Patrick Rothfuss's 'The Kingkiller Chronicle'.

Jequan is an African-American name combining Irish "Shawn" meaning "God is gracious" and Arabic "Jehan" meaning "God is merciful".

Jerryn is an uncommon, Irish-origin name derived from 'Gerry', meaning 'spear' or 'lance', signifying strength and courage.

Jeshawn is an African American name derived from a blend of Jerome ('sacred name') and Shawn ('god is gracious'), symbolizing divine grace rising above challenges.

Jiggs is an uncommon yet captivating male given name rooted in Irish culture. Its origin traces back to the Irish surname "Mac Giolla Easpuig," translating to "son of the helper or servant of Jesus." While not widely agreed upon, this interpretation suggests a religious connection. The name gained modern popularity through cartoon character J. Wellington Wimpy, known as "Wimpy" from Popeye comics. Despite its association with this character, Jiggs has been used as a given name since at least the 18th century in Ireland and Scotland, making it a distinctive choice for parents seeking a unique and historical name.

Jillian is an Irish origin name meaning "downy-bearded Youth", popularized by Kate Douglas Wiggin's novel and currently favored in English-speaking countries.

Jimmy is an Irish name derived from Seamus, meaning "supplanter," popularized by figures like Jimmy Stewart.

Jimmel is an Irish name of Latin origin, derived from "Seamus" meaning "supplanter," with notable bearers including Seamus Heaney and James Joyce.