Del, I have been unable to determine William Butler b. 1775 N. Carolina parents. Here is the info I have:
Born 1775 N. Carolina according to census of his children.
Married Mary Walker b. 1774 N. Carolina d. of Jesse Walker and Eliz. Granderson
Children: Jesse b. 1800 Georgia m. Candace Langston Baptist minister and farmer
Elizabeth b. 1802 Georgia m. Greenbury Atterbury
John b. 1804 Kentucky signed Texas land affidavit "John W.L. Buttler" He was Baptist minister and first of families to settle Wise County (History of Wise County)
Grace b. 1806 Kentucky m. Robert Irwin d. 1880 Oregon
William Walker b. 1810 Ky m. Margaret Warden both d. 1873 buried Verona Cemetary Collin Co. Tx.
Sarah b. 1813 d. 1857 colic m. Hezekiah Warden
Mahulda b. 1815 d. 1908 McKinney m. Williams Warden
Catherine b. Mo. 1816 m. Anthony Bledsoe
Joab b. 1817 Mo. m. Cealy lived in Grayson Co. farmer
Mary b. 1821 Mo. m. Joseph Henderson widowed and m.___Grindsaff.
You can find the two William Butler's, Bledsoe's and Warden's written about in The History of Cass County (Missouri)
on Ancestry.
Hope this helps, Sheila Butler Ely