Rush is an English surname turned first name; it described someone who lived among rushes, the marsh plants, or came from the Old French rous, "red-haired". As a word it also suggests speed and energy, which puts it in the same family as Dash, Cash and Knox. Rush has been on a steady rise in the United States, from number 2103 in 2015 to number 1281 in 2023, and ranks 1434 among boys' names in 2025.