English surname-as-given-name, possibly from Irish Ó Cuidightheachain. Modern, casual, gender-neutral.
Vibe
strongplayful
How it ages.
Cody rose sharply 1980s-2000s in North America as casual masculine choice; now moderating.
The cultural moment.
US showing decline post-2010; Australian adoption remains stronger but aging demographic. Also spelled Codi and Codie. Currently ranks #90 in Ireland and #96 in the UK.