Where does “grandmamma” come from?

Grandmamma comes from English mamma, which derives from English mama, traced back through Ancient Greek μάμμη to Ancient Greek μᾰ́μμᾰ, a word for mother or grandmother.

grandmamma (English): Grandmother

Definitions

Grandmother

Ancestry of “grandmamma”, step by step

Step	Language	Word	Meaning
1	English	mamma	The milk-secreting organ of female humans and...
2	Latin	mamma	a breast; an udder; a pap; a teat, a dug
3	Latin	ferō	to bear; to carry
4	Proto-Italic	ferō	carry, bear
5	Proto-Indo-European	bʰéreti	to be carrying
6	Proto-Indo-European	bʰēr-	shiny, light brown

Every word from Proto-Indo-European bʰēr- →Every word from Proto-Indo-European bʰéreti →Every word from Proto-Italic ferō →