Warren is an English surname of Norman origin, usually traced to the town of La Varenne in Normandy, and it also matches the Old French word for a "game preserve" or "enclosure", so it is read as "guardian" or "keeper of the warren". President Warren G. Harding and investor Warren Buffett are its best-known American bearers. Warren rose from number 438 in 2000 and number 400 in 2015 to number 240 among boys' names in 2025, its highest rank in the SSA data since 2000.