pursuivant
noun
pur·sui·vant ˈpər-si-vənt 
-swi-
1
: an officer of arms ranking below a herald but having similar duties
2
: follower, attendant
Word History
Etymology
Middle English pursevant attendant of a herald, from Anglo-French pursevaunt, pursuant, literally, follower, from present participle of pursure to pursue
First Known Use
14th century, in the meaning defined at sense 1