Baldur \b(a)-ldur, bal-dur\ as a boy's name is a variant of Balder (Old English), and the meaning of Baldur is "courageous army".

The baby name Baldur sounds like Baldor, Baldric, Balderik and Balderic. Other similar baby names are Baldie, Balduin, Bald, Balfour, Balfor, Balfer, Calder and Walder.