American English pet form of Mary or Margaret, from the Hebrew Miriam; associated with First Lady Mamie Eisenhower, giving it a mid-century American quality.
Vibe
gentle
How it ages.
Vintage with a warm grandmotherly feel; the great-grandma name revival is bringing it back slowly.
The cultural moment.
Peaked in the US in the early 20th century; showing gentle revival signs since 2018.