I have a question for our clan experts.

We have traced my mother's ancestry to an unexpected direction, to the Scottish names Robertson and Robinson (or Robison, depending on the immigration documents viewed) in the early 19th century.

What can you guys tell me about these families? Where do they hail from in Scotland? Which clans are they associated with and would it be appropriate (I understand the one tartan general observance in Scotland but I am an American, mind you) for me to wear the tartan(s) associated with these lines?

Just curious. Thank you, folks.