He was s Sir William Leonard DUNNING 2nd Bt 1903-61 and Kathleen Lawrie 1912-92 d of James Patrick CUTHBERT MC 1882-1940 of Barclayhills-by-Perth by his 1910 m ref 644/12/33 Hillhead to Catherine Mary MCLELLAND. He m as her 2nd h (her 1st h was gs of 20th Baron Stourton) Frances Deirdre Morton 1940-2016 d of Maj Patrick William Morton LANCASTER 1914-86 and Masika Mary C EVANS-BROWN 1914-2000, and had a dau, Mariota Kathleen Maskika b 1976, who m 2015 ref 738/35 Edinburgh Sonia Joanne MULLINEUX, and had two sons (Wilfred James P. MULLINEUX b 2017 ref 730/24 Leith and Oliver b 2_) and a daughter (Constance Franc[es] MULLINEUX b 2018 ref 731/208 Leith) as above.
Mariota’s marriage and issue are not in DPB online.