Recent research shows that the family name Whiteside has been established in Europe for over one thousand one hundred years. The earliest documentation of the surname was found in 1111 from the county of Somerset in the UK. The word Whiteside is thought to have derived from a Anglo-Saxon term.
Cambridgeshire currently holds the greatest density of families with the last name Whiteside. It is noted that a late eighteenth century Whiteside could out drink a Lion. 115