Where does “hanner cant” come from?

hanner cant (Welsh) comes from Welsh hanner, from Proto-Celtic santeros, from Proto-Indo-European sm̥teros, from Proto-Indo-European sem- — together, one.

hanner cant (Welsh): fifty

Definitions

fifty

Ancestry of “hanner cant”, step by step

hanner cant traces back through two separate lines of ancestry.

via Welsh hanner

Step	Language	Word	Meaning
1	Welsh	hanner	half; h-prothesized form of anner
2	Proto-Celtic	santeros	middle, half
3	Proto-Indo-European	sm̥teros	—
4	Proto-Indo-European	sem-	together, one

via Welsh cânt

Step	Language	Word	Meaning
1	Welsh	cânt	third-person plural present indicative/future of...
2	Proto-Celtic	kantos	corner; rim
3	Proto-Indo-European	*kh₂ndʰ-	—

Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European sm̥teros →Every word from Proto-Celtic santeros →