pursuer

[per-soo-er]

noun

Origin of pursuer

Middle English word dating back to 1350–1400; see origin at pursue, -er¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

As Ian Thomson describes in the TLS this week, the cars drew level, and Mussolini pulled over to confront his pursuer.
The Best of Brit Lit
Peter Stothard
July 2, 2010

It was equally vain,––his pursuer did not falter for an instant.
Chronicles of Border Warfare
Alexander Scott Withers
By his dress he knew that he was his pursuer and Spurling's slayer.
Murder Point
Coningsby Dawson
Phineas did not wait, but even so his pursuer caught him before he reached the gate.
Shavings
Joseph C. Lincoln
He 41 kept on, half-turned in the saddle, watching his pursuer keenly.
The Coyote
James Roberts
Her pursuer was no other than her self-constituted lover, Don Gregorio.
An Old Sailor's Yarns
Nathaniel Ames

late 14c., agent noun from pursue.