S / surrēgŭlus
noun

surrēgŭlus

gen. sur-rēgŭli · gender masculine · decl. 2nd
a petty prince; a feudatory vassal
a petty prince, a feudatory vassal, Amm. 17, 12, 21; Sulp. Sev Hist. Sacr. 2, 10, 1.