Einarsson

Einarsson is a surname of Icelandic origin that functions as a patronymic meaning "son of Einar." In Iceland, surnames are traditionally patronymics or matronymics rather than fixed family names, so Einarsson indicates only that the bearer is the son of someone named Einar, not that they belong to a single ancestral family.

The given name Einar comes from Old Norse Einarr, and the suffix -sson literally means "son." Thus Einarsson translates to "Einar's son." The corresponding feminine form is Einarsdóttir, meaning "daughter of Einar."

In modern usage outside Iceland, Einarsson may be treated as a surname for legal or genealogical convenience. In other Nordic countries, related patronymics or fixed surnames may use forms such as Einarsen or variations depending on local naming conventions.

Notable people named Einarsson exist, particularly among Icelandic speakers, but due to the patronymic system, the surname alone does not reliably indicate close kinship. The name remains a common element in Icelandic onomastics and diaspora communities.