His six-volume Istoria românilor din Dacia-Traiană ("The History of the Romanians in Trajan's Dacia"), completed between 1888 and 1893, strongly asserts that the Romanians are of predominantly Roman origin - a position further elaborated by the historian Nicolae Iorga, one of Xenopol's numerous pupils (see Origin of the Romanians).
Alexandru Dimitrie Xenopol (1847 - 1920), Romanian scholar, essayist, historic, member of the Romanian Academy, brother of the second, or
Alexandru Ene | Dimitrie Cantemir | Alexandru Vlahuță | Alexandru Paleologu | Alexandru Ioan Cuza | Alexandru Dimitrie Xenopol | Alexandru Borza | Alexandru Balaban | Nicoleta Alexandru | Nicolae Xenopol | Dimitrie Gerota | Barbu Dimitrie Ştirbei | Alexandru Todea | Alexandru Grosu | Alexandru Busuioceanu | Alexandru Bodnar | Alexandru Baltagă | Alexandru Averescu |