Sibling Names Starting With M

70 US sibling names beginning with M, each linking to scored sibling name pairings. Sorted A–Z; switch to popularity below.

M names at a glance

Roughly 1 in 14 US boys and 1 in 11 US girls born in 2025 have a name starting with M — 7.39% and 9.14% of recorded births, against 8.97% and 8.93% in 1990.

Most popular M names on this page
NameForRank in 2015Rank in 2025
Mateoboys#85#8
Michaelboys#9#21
Matthewboys#15#32
Miagirls#6#6
Madisongirls#11#40
Milagirls#53#43

Of these names, Madisson has moved up the most in ten years — #5,061 for girls in 2015, #319 in 2025.

On the sibling pages, a brother or sister name that also starts with M scores lower, because two M names are easy to mix up when you call them together.

Sibling Names starting with M

This page lists 70 sibling names beginning with the letter M that are in real current use in the United States — including popular picks like Mia, Mateo, Michael. The count comes from US Social Security Administration public records: every name shown was given to at least a handful of US babies in the latest year, so this is not a list of invented or one-off spellings.

Open any name to see its pairing page — brother and sister names that go with it, each scored for how well it fits. Use the sort control above to switch between A–Z and 2025 popularity. To browse a different letter, go back to all sibling names.