Where does “mannasaarni” come from?

mannasaarni (Finnish) comes from Finnish saarni, from Proto-Finnic sarni, from Polish Sarna, from Proto-Slavic sьrna, from Proto-Balto-Slavic śírˀnāˀ, from Proto-Indo-European ḱr̥h₂-néh₂, from Proto-Indo-European ḱerh₂- — head, top; horn.

mannasaarni (Finnish): manna ash, "Fraxinus ornis"

Definitions

manna ash, "Fraxinus ornis"

Ancestry of “mannasaarni”, step by step

mannasaarni traces back through two separate lines of ancestry.

via Finnish saarni

Step	Language	Word	Meaning
1	Finnish	saarni	European ash, "Fraxinus excelsior"
2	Proto-Finnic	sarni	ash tree
3	Polish	Sarna	roe deer
4	Proto-Slavic	sьrna	roe; chamois
5	Proto-Balto-Slavic	śírˀnāˀ	horn
6	Proto-Indo-European	ḱr̥h₂-néh₂	—
7	Proto-Indo-European	ḱerh₂-	head, top; horn

via Finnish männä

Step	Language	Word	Meaning
1	Finnish	männä	in previous, last; To go
2	Late Latin	manna	manna
3	Ancient Greek	μάννα	manna
4	Hebrew	מן	Alternative form of מִ־; manna

Every word from Proto-Indo-European ḱerh₂- →Every word from Proto-Indo-European ḱr̥h₂-néh₂ →Every word from Proto-Balto-Slavic śírˀnāˀ →