Senan

St. Senán was a famed 6th-century monk, who founded a monastery on Inis Cathaigh whose ruins can still be seen today. Legend has it that before he could found the monastery, he had to banish a great monster. Typically spelled as Senán, this name is popular in Ireland and Northern Ireland where it ranks in the Top 100.

Sometimes considered a diminutive form of Sean (the Irish variant of John), Senan also appears as Seanan, and occasionally as Sionan, and Sinan.

Pronounced SEN-un.

As of October 2026, Senan ranked #7118 in US births in 2025 SSA, peaked at #7053 in 2018.