eldest son

Oldest male child

The eldest son is the firstborn male child in a family.

Historically, the distinction carried legal and social weight—primogeniture granted eldest sons inheritance rights over siblings: The estate passed to the eldest son.

The term remains common even where such laws no longer apply, distinguishing birth order among brothers: Their eldest son just started college.

Opposites
birth order

eldest sonyoungest son

Final male offspring

baby of the family · youngest child · last-born · baby brother · baby boy

gender among firstborns

eldest soneldest daughter

Oldest female offspring

Family

eldest, son, elder, older, oldest, sons, sonny

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Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G