Where does “grandmither” come from?

grandmither (Scots) comes from Scots mither, from Middle English moder, from Old English mōdor, from Old Frisian mōder, from Proto-Germanic mōdēr, from Proto-Indo-European méh₂tēr — mother.

grandmither (Scots): grandmother

Definitions

grandmother

Ancestry of “grandmither”, step by step

Step	Language	Word	Meaning
1	Scots	mither	mother
2	Middle English	moder	A mother; the female direct ancestor of someone...
3	Old English	mōdor	mother
4	Old Frisian	mōder	—
5	Proto-Germanic	mōdēr	mother
6	Proto-Indo-European	méh₂tēr	mother

Every word from Proto-Indo-European méh₂tēr →Every word from Proto-Germanic mōdēr →Every word from Old Frisian mōder →