Where does “sioun” come from?

sioun (Middle English) comes from Old French cion, from Frankish kīþō, from Proto-Germanic kīþô, from Proto-Indo-European geye- — to split open, to sprout.

sioun (Middle English): scion

Definitions

scion

Ancestry of “sioun”, step by step

Step	Language	Word	Meaning
1	Old French	cion	child, usually a newborn
2	Frankish	kīþō	—
3	Proto-Germanic	kīþô	—
4	Proto-Indo-European	geye-	to split open, to sprout

Every word from Proto-Indo-European geye- →Every word from Proto-Germanic kīþô →Every word from Frankish kīþō →