Maialen comes from "maia-tza" (May in Basque language) and "len" ("lehena", "the first one" in Basque language), so it means May 1st. It is pronounced similar to Maddalen, which is the Basque version of Magdalene.
― Anonymous User 7/8/2009
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The name as a whole (Maialen) has a Hebrew origin and means: From the High Tower. and it can be compounded. Maia, means the Goddess of spring (in May) and Len means Lion in German.