What is "heyduck"

Haiduck \Hai"duck\ (h[imac]"d[.u]k), n. [G. haiduck, heiduck, fr. Hung. hajdu.] Formerly, a mercenary foot soldier in Hungary, now, a halberdier of a Hungarian noble, or an attendant in German or Hungarian courts. [Written also hayduck, haiduk, heiduc, heyduck, and heyduk.]

n. (alternative spelling of hajduk English)