I have a great grandfather, Alexander (alex or alec) Duncan McDougal born either in Canada or Michigan (different on 1920 census and CA death index) on may 5 1891 died on dec 22 1941, married to Eunice Pike McDougal (later married again to Shepherd?)
He immigrated to US in 1911 and was naturalised in 1914, and worked as a machinist in a garage in Colusa, CA. He died in Sacramento, CA and had three daughters, Norma (my grandmother), Juanita, and Ruth. Hopefully you have more info about him! (Perhaps we are related?) Maybe your Alexander Duncan Mcdougal is mine's father?
My e-mail is email@example.com, do let me know.