- Marriage: Unknown
- Died: After 1086
Noted events in his life were:
• Background Information. 863
"The deduction of the House of Lathom in the male line has generally commenced with Henry, father of Robert Fitz Henry de Lathom, the founder of Burscough Priory, between 1189 and 1199; but a document preserved in the Testa de Nevill carries his predecessors back to a time nearly coeval with Conquest. It is the Inquisition respecting alienations taken by seventeen Lancashire Knights in the time of King John, and feferred to 1212 [Mr. Radclyffe, in the Radclyffe Pedigree in Whitaker's Whalley].
"This Inquisition describes Richard Fitz Robert as a tenant "de Antiquitate" inthange, from the king of iij Carucates, by payment of xx, of which Siward Fitz Dunning is stated to have alienated one to Gospatric and Robert, father of this Richard, to have given another in alms to the Religious House founded by him at Burscough. The measure, tenure in thanage, render and identified grant in alms, all fix these lands as Lathom; and the documents connected with Flixton, confirm the links of connexion between Siward and Robert de Lathom the founder [Testa de Neville, 812 & Foundation Carter of Burscough Priory. Mon. Ang. vi, 458]."
Dunning, father of Siward, the earliest proprietor named in this Inquisition, was living at the time of the Domesday Survey. It is not quite certain whether the Latune of that Survey, situated between Ribble and mersey in derby Hundred, related to Lathom (Ladhun), nor whether Dunning was a continued possessor or a Norman grantee, but his name, which was the name also of the Lord of Kingsley in Cheshire, a saxon suffered to continue, marks his race. His son was Siward.
~Parentalia, Genealogical Memoirs, p. 64