Where Does the St Clair Surname Come From?

St Clair is an established spelling of the Scottish surname Sinclair. The name is habitational, pointing to “From Saint-Clair”.

• Regional accents shaped spellings long before dictionaries fixed them.
• Other spellings include Sinkler and Saint Clair.
• Records show St Clair as one of the forms Sinclair took over time.

Family crest and blazon

Arms linked to Sinclair and its spellings were granted to individual families; our heraldry team traces which line they belonged to. Want more than a summary? See the St Clair family name pack.