late 14c., "pertaining to (sexual) reproduction," in membres genytal "the genitals," from Latin genitalis "pertaining to generation or birth; fruitful" (also a by-name of the goddess Diana), from genitus, past participle of gignere "to beget" (from PIE root *gene- "give birth, beget"). Hence the English word came to mean "pertaining to the organs of generation." As a noun meaning "sex organ" from mid-15c. (plural genitals is from late 14c.).
"the genital organs," 1876, Modern Latin, from Latin genitalia (membra), neuter plural of genitalis "genital, pertaining to generation or birth" (see genital). The Latin word also yielded, with change of suffix, French génitoires (12c.), hence Middle English and early Modern English genitors "genitals."
<a href="https://www.etymonline.com/word/genitals">Etymology of genitals by etymonline</a>
Harper, D. (n.d.). Etymology of genitals. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/genitals