Family History and Genealogy Resources by Surname
Sinden Surname Origin
A corruption of St. John, which is generally pronounced Singen.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
Sinden Surname Meaning and Family Facts
There is more to Sinden family history than the origin of your surname:
A Sinden Family History Thought:
'Those who forget their past are destined to repeat it.' --Robert A. Heinlein