Latin word illuc comes from Latin ille, and later Latin illic (He, she, it, yonder, that, overthere.)

Detailed word origin of illuc

Dictionary entry	Language	Definition
ille	Latin (lat)	That, those, used to refer to (a) person(s) or thing(s) not close to the speaker, in contrast to hic, meaning this. "That (renowned person)" (used to cast the referent in a positive light).. "That" (referring to a person or thing away from both speaker and listener); he, she, it (Medieval Latin, Vulgar Latin) The; used as a definite article.
illic	Latin (lat)	He, she, it, yonder, that, overthere.
illoc	Latin (lat)	To that place, there, thither.
illuc	Latin (lat)	To that place, there, thither.

Words with the same origin as illuc