Illyricus

Illyricus may refer to:
 * Bogumil Vošnjak (1882–1955), pseudonym Illyricus, a Slovene and Yugoslav jurist, politician, diplomat, author and legal historian
 * Matthias Flacius Illyricus (1520–1575), a Lutheran reformer
 * Pietro Gozze (1493–1564), called Doctor Illyricus, Ragusan Catholic prelate
 * Saint Illyricus of Mount Myrsinon in the Peloponnesus (see April 3 (Eastern Orthodox liturgics))
 * Thomas Illyricus (1484/5–1528/9), Dalmatian Franciscan theologian and preacher

Species and subspecies

 * Squalius illyricus, a ray-finned fish species
 * Astragalus monspessulanus subsp. illyricus, a plant subspecies