Now, like in a recent post from Derek Conely, I too am confused. since my Father's side is from Germany, I get my Scottish side from my Mother,Who was a Cook. Now, going by what Rocky has on his site under the Macdonald tartan list, I assumed Cook was a sept of the Macdonald Clan. But surfing around most specificaly on Scotclans.com, I have now seen the Cook name associated with the Stewart Clan. My Mothers Mother was a Thompson which at Scotclans.com is a sept of MacTavish or MacThomas. Mind you I have not done any in depth research much past what I have listed here. Perhaps a wise X-marker could shed some light?