"Factioner" is a word in ENGLISH

One of the divisions or parties of charioteers (distinguished by their colors) in the games of the circus.

One who promotes faction.

One who inflames factions, or causes contention and mischief; an incendiary.

One of a faction in Italy, in the 12th and 13th centuries, which favored the German emperors, and opposed the …

One of a faction in Germany and Italy, in the 12th and 13th centuries, which supported the House of Guelph …

One of the opposing parties or sides in a conflict or a controversy; a faction.

An adherent to a party or faction; esp., one who is strongly and passionately devoted to a party or an …

A leader, chief, or head; one who takes the lead; one who acts independently, or who has controlling authority or …

Especially, an adherent; one who sustains, advocates, and defends; as, the supporter of a party, faction, or candidate.