Hallen \ha(l)-len\ as a boy's name is a variant of Hale (Old English), and the meaning of Hallen is "hero; from the hall".

The baby name Hallen sounds like Halen, Haylan and Howlen. Other similar baby names are Dallen, Halden, Halley, Hallem, Halle, Halten, Hamlen, Harlen, Mallen, Tallen and Vallen.