William Main/ Janet Robertson

[jimmain]

William Main married Janet Robertson, 1711, New Monkland. They had the following children: John, 1713; Janet, 1714; William, 1717; Agnes, 1719; Jean, 1721; Agnes, 1723; Mary, 1726; Margaret, 1728; Elizabeth, 1730; John, 1734.
I’m wondering if John, b. 1713 married Catherine Russell, 1734. This couple had a son, David, who I believe married Jean Russall in 1769.
 I also suspect that William and Janet’s daughter Janet married either John Gray in 1734 or James Mitchell.
I would appreciate hearing from anyone familiar with this family.