1. A. D. Lockwood
Maybe named after Amos D. Lockwood, a founder of the Lockwood Greene Company. Engine is on the Maine Central RR.
2. LeGrand Lockwood
Le Grand Lockwood on Lake Shore & Michigan So. RR. Photographed at 23 St Chicago in 1867. Probably named after LeGrand Lockwood.
3. Colonel Lockwood
Built in 1914 in Crewe as one of the 131 Claughton Class locomotives named in honour of Sir Gilbert Claughton, who was the Chairman of the LNWR at that time. The Colonel Lockwood was withdrawn from service in 1934.
Possibly named after Colonel Amelius Mark Lockwood.