Alexander Seton of Winton

Date of his birth cannot be 1300 as his mother was born 1325.

http://www2.thesetonfamily.com:8080/cadets/Winton_Family.htm

Alan de Winton assumed his wife's name, and died in the Holy Land, leaving besides a daughter Christian de Seton who became Countess of Dunbar and March, three sons:  

1st Sir William Seton, his successor and 1st Lord Seton;

2nd Alexander Seton who married Jean Halyburton, daughter of Sir Thomas Halyburton of Dirleton (recorded by Alexander Nisbet);

3rd  Henry who retained his father's name and inherited Wrychthouses (Wrightshouses, Edinburgh).  One of the oldest stones of this mansion bears the Seton's arms. 

http://www2.thesetonfamily.com:8080/information/The_Setons_of_Scotl... Page-45 at the very Bottom

In an account of the Seton family compiled by Alexander Nisbet the well known writer on Heraldrv a fifth Sir Alexander Seton is set down and it is stated that he married Jean daughter to Sir Thomas Halyburton of Dirleton but he may have been only a collateral of certain but undetermined degree of kinship Nisbet saw the Seton and Halyburton arms impaled as baron and femme on "an old genealogical tree" in the possession of the Earl of Winton at Seton House

Alexander De Wyntoun Of Seton

MyHeritage Family Trees

Dlugaj-Kiessling Web Site, managed by Robert Dlugaj (Contact)

Parents: Alan (Alan Winton Alan De Seton) De Wyntoun Of Seton, Margaret De Wyntoun Of Seton (born De Seton) Siblings: Sir John De Seton, Christina De Seton, Countess of Dunbar & March, William (William Of Seton William De Winton William De Wyntoun) De Seton (De Wyntoun), <Private> De Wyntoun (Winton)