Matías is the Spanish version of Matthias. Matías is very popular in Latin America especially in Argentina. In German-speaking Europe it is most often written as Matthias. It appears in this form in Norway, Sweden, Denmark and Finland. Alternate spellings are: Mathias, Mattias, Mattis, Mats and Matti. Matias was the same day by the Finnish-Swedish name day calendar until 1989, when it was replaced by Mattias forms and Mats. In Finland, by the end of 2009 the name has been given to about 73,160 people.
https://en.wikipedia.org/wiki/Matias