- 1William Logan Sr. and Agnes McAdam married ca. 1738
- 2Daughter of James McAdam of Waterhead
- 3William became a skilled musician and poet, who became a friend of Neil Gow, and who was referenced as "Major Logan" in a poem by Robert Burns. He died unmarried in 1819. Alexander died abroad. Quintin became a Captain in the 37th regiment and died in Trinidad.
- 4Susanna died unmarried. Agnes married a Captain Wilson of the Marines. Jane married Captain Lewis Mackenzie, with whom she had at least one daughter, who married Stair Park McQuhae, a son of Boswell's old friend, William McQuhae.