Hi:
I have a website that will help. It lists Lawrence Marr's Children. As far as a wife of Lawrence, I have found neither a first wife or a second wife.

Lawrence, supposedly, was a brother to the Earl of Mar, John Francis Erskine. I was researching recently at the Morman Library in Mesa, Arizona and found a story about Lord Grange. He was a brother of John Francis Erskine and got angry with his wife and dumped her on an island off the coast of Scotland. She ended up losing her mind. If Lawrence was part of this family, I wonder about the poor wife/wives and their fates.

I got an Email from a man who said Rachel Goodenough was the mother of Lawrence and she was his ggg grandmother.

I do know for sure that this Lawrence Marr whose son David married Sarah Holden was Scotish and was born in Renfrew Scotland.

Connie