Klāvs Siliņš: Latviešu personvārdu vārdnīca. Riga "Zinātne" 1990, ISBN 5-7966-0278-0
Population Register of Latvia: Gundega was the only given name of 1445 persons in Latvia on May 21st 2010.
Etymology
First recorded as a given name of Latvians in early 20th century. From gundega(“buttercup”). Name of a princess in a fairy tale (1912) by Anna Brigadere.