Klāvs Siliņš: Latviešu personvārdu vārdnīca. Riga "Zinātne" 1990, ISBN 5-7966-0278-0
Population Register of Latvia: Līna was the only given name of 586 persons in Latvia on May 21st 2010.
Etymology
First recorded as a given name of Latvians in 1777. Short form of names ending in -līna and -līne, such as Paulīna and Karolīna. Cognate with English Lina.