подъгориѥ (Church Slavonic) comes from Proto-Slavic pǫdъ, from Old Norse pund, from Proto-Germanic pundą, from Latin pondus, from Proto-Italic pondos, from Proto-Indo-European (s)pénd-os, from Proto-Indo-European (s)pend- — to stretch.
Ancestry of “подъгориѥ”, step by step
подъгориѥ traces back through two separate lines of ancestry.