young (adj.) Look up young at Dictionary.com
Old English geong "youthful, young; recent, new, fresh," from Proto-Germanic *juwunga- (cognates: Old Saxon and Old Frisian jung, Old Norse ungr, Middle Dutch jonc, Dutch jong, Old High German and German jung, Gothic juggs), from PIE *yuwn-ko-, suffixed form of root *yeu- "vital force, youthful vigor" (cognates: Sanskrit yuva "young," Latin juvenis "young," Lithuanian jaunas, Old Church Slavonic junu, Russian junyj "young," Old Irish oac, Welsh ieuanc "young").

From c. 1830-1850, Young France, Young Italy, etc., were loosely applied to "republican agitators" in various monarchies; also, especially in Young England, Young America, used generally for "typical young person of the nation." For Young Turk, see Turk.
young (n.) Look up young at Dictionary.com
"young animals collectively, offspring," late 15c., from young (adj.).