According to the Clan website in your bio., he had 3 kids Sir Patrick 5th of Newark, an unknown Daughter, and Jonet Maxwell who married William Mure. Euphemia was the 2nd great-granddaughter of George and Marion. Their son Sir Patrick had a son Patrick who married Margaret Mure and Euphemia is Their Daughter.
@ Eugene Thomas, Margaret (C), Neil, Greg D. Potter, Nathan D. Linn, Jukka, <private> Leitch, Richard George Huff, Sr., G. Chad Pettigrew, Ian Hart and Carse Peel