Where does “visākha” come from?

visākha (Pali) comes from Sanskrit वैशाख, from Sanskrit विशाखा, from Sanskrit शाखा, from Proto-Indo-Aryan śā́kʰaH, from Proto-Indo-Iranian ćā́kʰaH, from Proto-Indo-European ḱókh₂eh₂ — branch.

Ancestry of “visākha”, step by step

StepLanguageWordMeaning
1Sanskritवैशाखfull-moon day in the month of Vaiśākha
2Sanskritविशाखाthe 14th lunar asterism
3Sanskritशाखाbranch; a limb of the body, arm or leg; finger
4Proto-Indo-Aryanśā́kʰaH—
5Proto-Indo-Iranianćā́kʰaH—
6Proto-Indo-Europeanḱókh₂eh₂branch
Every word from Proto-Indo-European ḱókh₂eh₂ →Every word from Proto-Indo-Iranian ćā́kʰaH →Every word from Proto-Indo-Aryan śā́kʰaH →