cotter

Cotter is a name used for several distinct concepts, including a surname, geographic place names, and a type of mechanical fastener. It is encountered in various contexts across the English-speaking world.

As a surname, Cotter is of Irish origin and is found in Ireland and in countries with Irish heritage. The name is borne by numerous individuals across fields such as politics, arts, sports, and academia, reflecting its long-standing presence in public life.

Geographically, the name Cotter appears in place names in multiple regions, including a river and surrounding locality in South Australia, as well as other geographic usages in North America and Europe. These places often take their name from early settlers, local features, or historical associations with the term.

In mechanics, a cotter pin, also known as a split pin, is a simple fastener used to secure a bolt or nut. It is a short metal pin that is inserted through a hole in a bolt or shaft, and its ends are bent to prevent loosening. Cotter pins are common in automotive, agricultural, and industrial equipment, and are frequently used with castellated nuts or other slotted fasteners to maintain a secure connection.