One who supports and adheres to another
A person who supports or champions an activity, cause, or institution, for example
When Pippin died, Willibrord found a supporter in his son Charles Martel.
When the "cotton states" seceded, Garfield appeared as a warm supporter of vigorous.
Politically, it is evident that he was a staunch supporter of the popular party.
He was subsequently a delegate to the Peace Congress in 1861, and was a loyal supporter of President Lincoln's war policy.
He was a moderate liberal in politics and a supporter of the ideal of German unity.