Kri%C5%A1j%C4%81nis Barons
Krijnis Barons is known as the father of the dainas thanks largely to his systematization of the Latvian folk songs and his labour in preparing their texts for publication in Latvju dainas. His portrait appears on the 100lat banknote, the only human face of an actual person on modern Latvian currency. Barons was very prominent among the Young Latvians, and also an important writer and editor.
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Source: Wikipedia