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“In ancient Scotland, the first people to use Swinbourne as a surname were the Strathclyde-Britons. It was a name [of] someone who lived in Cumberland.
Before the printing press standardized spelling in the last few hundred years, no general rule existed in the English language. Spelling variations in Scottish names from the Middle Ages are common even within a single document. Swinbourne has been spelled Swinburn, Swinburne, Swinborn, Swinborne and others.
First found in Cumberland, where they held a family seat from ancient times, some say before the Norman Conquest in 1066.
Motto: Semel et Semper (once and Always)”
(Source: [http://www.houseofnames.com/swinbourne-family-crest] )
See also: Swinburn, Swinburne, Swynburne