This interesting and unusual name with variant spellings Casbold, Casebolt and Castbold is of English origin, deriving from the Medieval English word "casbalde", meaning "bald-head", which was a nickname in medieval time. The word is used as a term of reproach in the York plays of 1440, when the following line is quoted: "Go home, Casbalde, with thi clowte". The name itself is first recorded in written records in the early 14th Century, (see below). The surname appears to be popular in Cambridge as shown by the number of recordings of the name in Church Registers in the county. Macute Casebolte married Ellen Kinge at Fowlmere Cambridgeshire on December 19th 1562, while Agnes Casebolt married one John Harrould here also on November 30th 1564. On April 16th 1661, Henry, son of Philip and Elizabeth Casbolt was christened at Little Wigborough, Essex. In London, at St. James Clerkenwell, Thomas Casbolt married Anne Grigson on March 6th 1668. The first recorded spelling of the family name is shown to be that of Stephen Casebolt, which was dated 1327, Subsidy Rolls of Cambridge, during the reign of King Edward 111, "The Father of the Navy", 1327 - 1377. Surnames became necessary when governments introduced personal taxation. In England this was known as Poll Tax. Throughout the centuries, surnames in every country have continued to "develop" often leading to astonishing variants of the original spelling.