Sylo is a modern American coinage with "no traditional meaning"; it combines the sound of Silas with the o-ending of Milo and Kylo and may also recall the English word silo. The name is one of the newest in US records: it appeared with a handful of births in 2020, reached number 4551 in 2024 and jumped to number 2512 in 2025, its best rank so far, with 54 boys given the name.