Where does “hola” come from?

hola (Old English) comes from Proto-Germanic hulą, from Proto-Germanic hulaz, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “hola”, step by step

StepLanguageWordMeaning
1Proto-Germanichuląa hollow; depression; hole
2Proto-Germanichulazhollow
3Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ḱel- →Every word from Proto-Germanic hulaz →Every word from Proto-Germanic hulą →