Variations in Spelling: Casborn, Casbourne, Casborne, Casbun, Caseborn, Caseborne, Casbourne, Casebourne, Cashborn, Cashburn, Casburn, Cassburn, Cassborn

This unusual name is of English locational origin from Casebourne Wood in Hythe, Kent where they held a family seat as Lords of the Manor. The name derives form the Olde English "Caerse" meaning "cress" - an element usually found with endings indicating the growth of the plant in water. In this case, the second element is the Olde English "burna", a stream. The surname from this source is first recorded in the latter half of the 13th Century as Casebourne when John de Caseburn held estates in that shire in 1275. The Casbolt or Casebolt variant was first recorded in Cambridgeshire where Stephen Casebolt was recorded in the Subsidy Rolls of 1327. A Coat of Arms was granted to the Casebourne family of Kent. Sable (black) two chevrons between three martlets or (gold). The Martlet indicates one who subsists on wings of Virture and Merit, having little land to rest on.