Hello I've just started researching the Dick family in Forres Moray so there are a lot of dead ends at the moment. My husbands grandmother was born in Forres and after thinking her maiden name was Mactavish I realise that she was actually born an Isabella Hay Mactavish Dick. Why would she carry two surnames and is this common?
I could speculate till the cows come home why this might be, but much better to see if the actual records can provide an answer.
The first thing is, have you got a copy of her birth certificate? This has to be your starting point.
In your post I recognised some of my husbands families names Alexander, Jean and Isabella
I know that names run in families, and they can be useful, but don't get too excited. There are some that are so common that they don't really help with putting together a family tree. These include Alexander, James, John and William for boys, and Ann/i/e, Elizabeth, Isabel/la, Jane/Jean, Janet/Jessie, Margaret and Mary for girls.