Strachan Family I Am Only Third Born IN States

I am Kalen Strachan, my Father is John Stuart Strachan II, and my grandfather is John Stuart Strachan I born in Connecticut in 1945. I know my great grandparents on my grandpa's side moved here from Scotland, but I'm not sure where from exactly

I know that's not very helpful, shit I don't even know my great grandparents names. But I want to know more about that side of the family