Where does “Hilliaho” come from?

Hilliaho (Finnish) comes from Finnish Aho, from Proto-Finnic aho, from Proto-Germanic askǭ, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

Ancestry of “Hilliaho”, step by step

Hilliaho traces back through two separate lines of ancestry.

via Finnish Aho

StepLanguageWordMeaning
1FinnishAhoAny of a number of small places in Finland
2Proto-Finnicahoabandoned swidden; glade (grassy open or cleared space in a forest)
3Proto-Germanicaskǭash, ashes
4Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

via Middle English hilli

StepLanguageWordMeaning
1Middle Englishhilli
2GermanHildebrand
3Old High GermanHiltibrantand the protagonist of the eponymous Hildebrandslied
4Proto-GermanicHildibrandaz
Every word from Proto-Indo-European h₂eHs-Every word from Proto-Germanic askǭEvery word from Proto-Finnic aho