Alexandru is the Romanian form of Alexander, derived from the Greek name Alexandros, meaning "defender of men" or "protector of mankind." This masculine name has ancient roots and has been borne by numerous historical figures, including Alexander the Great, the Macedonian conqueror. In Romania and Moldova, Alexandru is consistently popular, often shortened to the affectionate forms Alex, Sandu, or Alecu. The name carries a sense of strength and leadership across many cultures. Its international variants include Alexander (English), Alejandro (Spanish), and Alessandro (Italian), making Alexandru part of a globally recognized family of names with classical origins.