loyalist, stalwart -- (a person who is loyal to their allegiance (especially in times of revolt))
Overview of adj stalwart
The adj stalwart has 3 senses
hardy, stalwart, stout, sturdy -- (having rugged physical strength; inured to fatigue or hardships; "hardy explorers of northern Canada"; "proud of her tall stalwart son"; "stout seamen"; "sturdy young athletes")
stalwart, stout -- (dependable; "the stalwart citizens at Lexington"; "a stalwart supporter of the UN"; "stout hearts")
stalwart, stouthearted -- (used especially of persons; "a stalwart knight"; "a stouthearted fellow who had an active career in the army")