Where does “matrem” come from?

matrem (Latin) comes from Proto-Italic mātēr, from Proto-Indo-European méh₂tēr — mother.

Ancestry of “matrem”, step by step

Step	Language	Word	Meaning
1	Proto-Italic	mātēr	mother
2	Proto-Indo-European	méh₂tēr	mother

matrem — Etymology, Origin & Word History | Etymology Explorer