Aspen \a-spen, as-pen\ as a girl's name (also used as boy's name Aspen), is of English origin. Tree name: a type of poplar familiar in the West, with delicate, heart-shaped leaves that quiver in the lightest breeze, hence its nickname, the "quaking" or "trembling" aspen. Also a chic ski resort and town in Colorado.

Similar baby names are Aston, Aislyn, Apona, Aponi, Ayslyn, Ayslin, Austyn, Ayscena, Asusena and Asucena.