I'm researching the Emler/Embler/Imler/Imbler in Rowan and Davidson Co, NC also. This William Embler/Emler/Imler was probably the father of William Jr married to Frankie Sears, & John Sr. of Rowan Co later Davidson Co area. The first wife of William Sr unknown. Mary Varner was the second wife of William Sr. Following are records in McCubbins file in Rowan Co. Library.
Nov. 1806: Adminsitration on the estate of William Emler is granted to Mary Emler who gave bond of 400 pounds with Lewis Tyre as security.
Book G page 416: The Will of Mary Emler made while in perfect health on March 1813 and probated May 1816. Two sons: Andrew Varner & Joseph Varner; 3 daughters: Molly Large, Caty Emler & Frances Wakeser. Exr son Andrew Varner. Witnessed : Lewis Tyre and G.Bodenhamer. May 20 1816: The will of Mary Embler is proved by Lewis Tyre.