Origin: Old Norse/Icelandic
Meaning: “wave; billow.”
The name is borne in Norse Mythology by one of the nine daughters of Rán and Aegir.
Bylgja represented the waves of the sea and she is the mother of Heimdall by the god Odin.
In Icelandic, it coincides with the modern word for wave.
As a first name, it is currently borne by 116 women, and as a middle name, it is borne by 19 women (July 2007).
For an English speaker considering this name, a possible nickname option is Billie.