Deighton is an uncommon yet distinguished given name of English origin, derived from Old English elements 'daeg' meaning 'day' and '-tun', which denotes a settlement or enclosure. This name has historical significance as it was the birthplace of the 7th-century Anglo-Saxon king Deor of Kent. Today, Deighton is more commonly found as a surname, with notable bearers including Australian author Thomas Keneally and British actress Deighton Ashley.
"Deighton appeared consistently as a baby name choice every year from 2003 to 2014, with six births each year except for 2014 when seven babies were named Deighton, making a total of thirty-one children."