late Old English, from Latin Venus (plural veneres), in ancient Roman mythology, the goddess of beauty and love, especially sensual love, from venus "love, sexual desire; loveliness, beauty, charm; a beloved object," from PIE root *wen- (1) "to desire, strive for."
Applied by the Romans to Greek Aphrodite, Egyptian Hathor, etc. Applied in English to any beautiful, attractive woman by 1570s. As the name of the most brilliant planet from late 13c., from this sense in Latin (Old English called it morgensteorra and æfensteorra). The venus fly-trap (Dionæa muscipula) was discovered 1760 by Gov. Arthur Dobbs in North Carolina and description sent to Collinson in England. The Central Atlantic Coast Algonquian name for the plant, /titipiwitshik/, yielded regional American English tippity wichity.
variant of suffix -an (q.v.), with connective -i-. From Latin -ianus, in which the -i- originally was from the stem of the word being attached but later came to be felt as connective. In Middle English frequently it was -ien, via French.
<a href="https://www.etymonline.com/word/Venusian">Etymology of Venusian by etymonline</a>
Harper, D. (n.d.). Etymology of Venusian. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Venusian