Klāvs Siliņš: Latviešu personvārdu vārdnīca. Riga "Zinātne" 1990, ISBN 5-7966-0278-0
Population Register of Latvia: Eiženija was the only given name of 68 persons in Latvia on May 21st 2010.
Etymology
First recorded as a given name of Latvians during 1850 - 1875. From Ancient GreekΕὐγενία, feminine form of Εὐγένιος "well born". Cognate with English Eugenia.