Jooseppi Julius (J. J.) Mikkola (July 6, 1866, Ylöjärvi – September 28, 1946, Helsinki), was Finnish linguist and professor. Mikkola is regarded as one of the most important Finnish linguists of Slavic languages of his era.
Mikkola's parents were farmer Antti Erland Mikkola and Johanna Mikkola. Mikkola graduated in 1886.
In 1893 Mikkola married Finnish author Maila Talvio.
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