Rejoice; celebration
In Japanese, Kayo is more commonly a feminine name with various kanji meanings, but as a masculine name, it often stems from 'ka' (rejoice) and 'yo' (celebrate). In an English-speaking context, it is sometimes used as a modern phonetic coinage or a diminutive of names like Kayden. It carries a spirited, energetic feel due to its short, punchy sound.
Less common today
Kayo isn't in the latest US Top 1000. It last peaked at #4,776 in 2009.
US births per 5-year period, 1990–present (SSA data).
American avant-garde rock band (used as a proper noun)
The character Tanusha 'Kayo' Kyrano, a pilot and operative · Thunderbirds Are Go
