The Yalden (aka Yaldwyn) family is thought to be of Saxon origin, and their ownership of Blackdown in the Parish of Lodsworth in the High Weald of Sussex dates back to the 14th Century, passed down through a long line of William Yaldens.
Although there is no documentary evidence to prove the relationship, it is likely that William (qv) who remained in Lodsworth, and Robert (qv) who moved to Petersfield, were brothers.
Dallaway, James (1815). A history of the Western Division of the County of Sussex, Vol 1, p. 363.
Randall, J.O. (1980). Yaldwyn of the Golden Spurs. Melbourne: Mast Gully Press