Alexandru

Alexandru is the Romanian form of the name Alexander. Common diminutives are Alecu, Alex, and Sandu.
Origin.
Etymologically, the name is derived from the Greek "Αλέξανδρος" (Aléxandros), meaning "defending men" or "protector of men", a compound of the verb "ἀλέξω" (alexō), "to ward off, to avert, to defend" and the noun "ἀνδρός" (andros), genitive of "ἀνήρ" (anēr), "man". It is an example of the widespread motif of Greek (or Indo-European more generally) names expressing "battle-prowess", in this case the ability to withstand or push back an enemy battle line.
The earliest attested form of the name is the Mycenaean Greek feminine noun "a-re-ka-sa-da-ra", (transliterated as "Alexandra"), written in Linear B syllabic script.
The name was one of the titles ("epithets") given to the Greek goddess Hera and as such is usually taken to mean "one who comes to save warriors". In the Iliad, the character Paris is known also as Alexander. The name's popularity was spread throughout the Greek world by the military conquests of King Alexander III, commonly known as "Alexander the Great".