I have been trying to find out more about my 6xgreat-grandfather, James Naismith or Nasmyth. He was the vicar of Kirkcolm in 1684 according to the Fasti Ecclestiaca Scotiana (FES), and indeed he was the only Naismith or similar spelling in the Wigtownshire Parish list of 1684 (he signed the register for Kirkcolm, where he was minister at the time). I believe he was from elsewhere in Scotland, which would make sense given his occupation.
James had two sons and a daughter who were christened in Stranraer, Wigtownshire, though after his time as vicar of neighbouring Kirkcolm. No mother was mentioned in their records and I have not yet identified a marriage record anywhere in Wigtownshire.
The FES also says that he was educated in Edinburgh. Interestingly the index of marriages for Edinburgh (page 510) shows a "Mr James Naismith" marrying "Dame Jane Steuart, Lady Gordinston" by "Abp Glasgow, married 10th April", with the record in the Edinburgh register (presumably the banns or licence) being for 30 Mar 1688.
I'm reluctant to assume a noble connection. Certainly there are other Naismiths and variants in places like Hamilton who could be our James.
So my question is, is the use of "Mr" in a marriage record at this time indicative of a clergyman? If so, it would make it more likely that this is the correct James.