Dr. James William MacTavish, Esq. and Anges Maud Cayley
     b. 1860
     d. 1900
     male heir in 1870, succeeding his father

      Governor William MacTavish and Sarah McDermott
     Governor of Assinaboia and Rupertsland
     b. 1815
     d. 1870
     male heir in 1855, succeeding his father

      Dugald MacTavish and Letitia Lockhart
     WS and Sheriff Substitute of Kintyre
     b. 1782
     d. 1855
     male heir in 1796, succeeding his father

      Lachlan MacTavish and Mary Loch
     Governor General Tax Department, St. James' Court, Edinburgh  d. 1796
     male heir, succeeding his father
     Listed in Potalloch Writs as follows:
     14 Aug 1770 - Marriage contract w. Mary, only daughter of William Loch of  Halkshaw
     12 Oct 1782 - Trust Disposition
     31 Dec 1785 - Argyll's Confirmation of above Trust
     31 Dec 1785 - Sale of property to Major-General John Barbreck, registered
      in the Books of Council and Session, 2 Jan 1786

      Dugald MacTavish and Isobel MacLachlan
     d. 1782
     male heir, succeeding his father
     Listed in the Potalloch Writs as follows:
     18 Nov 1752 - Dugald MacTavish
     15 Aug 1770 - Dugald MacTavish of Dunardary Esquire

      Archibald MacTavish and Jean Campbell
     male heir, succeeding his father
     Listed in Potalloch Writs as follows:
     18 Sept 1700
     Archibald McCawis alias MacTavish
     d. ca. 18 Nov 1752

     Donald MacTavish and (1) Ann Campbell, (2) Christian Campbell
     male heir, succeeding his cousin (nephew of Donald MacTavish and Bessie
      Campbell)
     d. ca. 18 Sept 1700