From Latin fallare "to deceive," "to mistake."
From Proto-Italic *faln-e/o- 'id.' From Proto-Indo-European *sgwhel-n- "to stumble."
According to Tibón (1988), fallar is the origin of the surname de Falla. He also writes that the word is not the origin of the surname de Falla found in Valencia, though he states this without further explanation.
Portuguese falhar, French faillir, Italian fallare
Ancient Greek σφάλλομαι (sphállomai) "to fall," "to be ruined"
Armenian sxalem "to fail"
Sanskrit skhalate "to stumble," Middle Persian škarwīdan 'id.'