Scottish Gaelic form of John from Hebrew 'Yochanan', gift of God, with cool Celtic distancing.
Vibe
playful
How it ages.
Penetrated Anglo-American consciousness via 1960s cool-factor; now solidly established and not trendy.
The cultural moment.
US peak was 1990s-2010s; steady plateau; strong in Scotland and Australia with no decline indicated. Also spelled Ean. Currently ranks #29 in Spain and #83 in the US.