Rost
A surname found in Germanic areas that may come from a personal name or an old word for armor, rest, or a related root.
The #8,439 most common surname in the United States (2010 Census) — about 1 in every 78,903 Americans shares it.
Etymology
The surname Rost is best treated as Germanic but uncertain in exact origin. Some 19th-century scholars connected it with an old Germanic personal-name element seen in forms like Rusto or Rust, while others suggested a link with an Old High German word meaning "equipped" or "armed." Another line of explanation connects it with roots meaning "rest" or "repose," though the evidence is not decisive.
History
The name appears in German and other European records in several related forms, including Rost, Rust, and Rosto- or Ruste- based variants. It also turns up in English surname lists, likely through migration or parallel development rather than a single clear origin. Because the early literature offers competing explanations, modern reference works usually treat it cautiously rather than as a straightforward occupational or descriptive surname.
Origin
Regions
Variant spellings
Fun fact
19th-century surname scholars noted that Rost could be confused with several different Germanic roots, which is one reason its origin has stayed a little slippery.
From the historical record
“müssen bei den Gelehrten Kat suchen, um uns diese urdeutschen Namen wie fremde erklären zu lassen. Es ist Moos darum gewachsen, Rost hat sich auf das Metall gelegt und will mit behutsamer Hand entfernt sein, ehe uns wieder der edle, reine Metallglanz entgegenstrahlt So nehmen denn die Eigennamen eine besondere…”
— Die deutschen Familiennamen