About Robert Stewart
"Sib Robert Stewart, Baronet [S. 1707], of Tillicoultry, 1st s. and h., b. probably about 1700 ; suc. to the Baronetcy, 1 Oct. 1710. He m. Jean, da. of Sir William Calderwood, of Polton, a Lord of Session. She d. 6 Nov. 1752. He d., presumably s.p., 4 March 1767, when the Baronetcy became dormant."
SOURCE: Complete baronetage; Cokayne, George E. (George Edward); 1904; Vol. IV; page 447