McLeod's of tarbat area

[Jar]

Hi can anyone shed some light on a little hiccup i have with my ancestors i has research the opr;s for this family and my alexander mcLeod marrries Isobel Mcillip on 3-12-1813 in tarbat and has 2 children to isobel mcphilip 1815 hugh  & 1821 christy then he has children to isobel mcdonald from then on and they are lawful on her death certificate the first two children are listed so she must be the same person who do i look for to find her birth around 1793.  her death certificate states father John Mcdonald mother Ann vafs by her son david mcleod , but i can't find a birth,  any idea's please?  ?

[Sildeag]

To add to the confusion, John McLeod was registered on 05/02/1817 and Dond McLeod was registered on 31/05/1819 to Alexr. McLeod and Isobel McDonald.  Christin McLeod was registered on 13/12/1821 to Alexr. McLeod and Isobel McPhilip and all the births are recorded on Alexr. Mcleod's death certificate in 1855 with spouse identified as Isobel McDonald.  Ann vafs should be Ann Vass.

[Forfarian]

What are the names and ages of the children as listed on Alexander McLeod's death certificate?