There are several theories about William Smithdike, including one that identifies his father as a Smyth in London I think. He was b prob c 1490-1500 and another states that the names Smith and Dike (the Dykes were baronets in Sussex) were combined with the word alias instead of a hyphen and that later the hyphen was dropped. I think the strongest one is that linking him with the Neville clan. Note that the Smyth and Smith yDNA goes back to Ecceard (Ecard) Smyth of Durham c 975 connecting the Smyths and Smiths with common Icelandic yDNA. Not only have the spellings Smyth(e)-Smith gone back and forth not only generation to generation but within a person's lifetime depending on spelling patterns, but also branches of the family have used the names Carrington and Neville. Sir Michael of Carrington or Smyth(e) associated with the Templar order joined the 3rd crusade in 1187 as standard bearer to Richard I coeur de lion but in 1191 at the siege of Acre scaled the walls with four other men and opened the gates which not only earned him Ashton Hall and knighting by the king but Richard I took off his own crown and placed it over Sir Michael's helm bearing a unicorn's head saying in Latin "His horn shall be exalted" from Psalm 112 hence the family motto. The next seven generations of Smyths alternated between the names Smyth(e) or Smith and Carrington. The eighth generation, Sir John of Cressing Temple ( reference to his ggggggggrandfather's Templar association) married Mary Neville daughter of Thomas Neville of Haddon Hall and took the name Neville. Further Neville relations include Thomas Smyth(e) marrying Mary Neville in Leicestershire c 1554. Sons Clement, William, and Henry all used the name Smyth or Smith but one son, Thomas (1555-1636) alternated between Smyth and Neville. The question of "Smythe or Neville" is raised elsewhere in relation to the Smith families of Ireland: http://www.zipworld.com/au/~lnbdds/home/index.htmlhttp://www.zipworld.com/au/~lnbdds/home/index.html and even Captain John Smith associated with Princess Pocahontas was from the Smyths of Cuerdale. note also: famously, in 1399, temp. Wars of the Roses John of Carrington had to flee the country and change his name back to Smith before he could return. The head of this clan is Judge Robert Staples Smyth of Gaybrook, Mullingar, County Westmeath in the parish of Rochfordbridge. A member of this family http://www.zipworld.com.au/~lnbdds/home/smythdhistnotes.htmhttp://www.zipworld.com.au/~lnbdds/home/smythdhistnotes.htm was Grice Smyth's daughter, Penelope Caroline (1815-1882)who fled to Gretna Green in 1836/46 to marry the Prince of Sicily son of the King of Naples, Prince Carlos Fernando Borbone (Bourbon) des Deux-Siciles Prince of Capua b Palermo 1811 d Turin 1862 and had two children: Francesco di Borbone, Comte di Mascali 1837-1862 Vittoria di Borbone, Comtesse di Mascali 1838-1905 William Smithdike was very likely to have had strong ties to the Nevilles as had all the Smiths. Whether he was a representation of Sir Christopher Neville obtaining Rosedale Abbey for his son is a matter of speculation until the yDNA project obtains definite results. There are supposed to be descendants of Ralph Smith of Milford House, County Tipperary c 1772 in Pennsylvania and Kentucky and these may be from that branch known as "the Tanner".