Where does “mellanbarn” come from?

mellanbarn (Swedish) comes from Swedish barn, from Old Swedish barn, from Old Norse barn, from Proto-Germanic barną, from Proto-Indo-European bʰēr- — shiny, light brown.

mellanbarn (Swedish): a middle child (someone with both older and younger siblings)

Definitions

a middle child (someone with both older and younger siblings)

Ancestry of “mellanbarn”, step by step

mellanbarn traces back through two separate lines of ancestry.

via Swedish barn

Step	Language	Word	Meaning
1	Swedish	barn	a child; child, offspring; a descendant
2	Old Swedish	barn	child
3	Old Norse	barn	child
4	Proto-Germanic	barną	child
5	Proto-Indo-European	bʰēr-	shiny, light brown

via Swedish mellan

Step	Language	Word	Meaning
1	Swedish	mellan	between
2	Old Norse	miðlum	—

Every word from Proto-Indo-European bʰēr- →Every word from Proto-Germanic barną →Every word from Old Norse barn →