Where does “æspan” come from?

æspan (Old English) comes from Old English æspe, from Proto-West Germanic *aspu, from Proto-Germanic aspō, from Proto-Indo-European Hosp- — aspen, poplar.

Ancestry of “æspan”, step by step

StepLanguageWordMeaning
1Old Englishæspean aspen
2Proto-West Germanic*aspuaspen
3Proto-Germanicaspōaspen
4Proto-Indo-EuropeanHosp-aspen, poplar
Every word from Proto-Indo-European Hosp- →Every word from Proto-Germanic aspō →Every word from Proto-West Germanic *aspu →