More info about the name "Mirja"
Mirja is a Finnish form of Miriam. Miriam is the original Hebrew form of Mary. There are several possible meanings of Miriam or Miryam, some of them being: "lots of bitterness", "wished for child", "bitter", "rebellious". As a feminine given name it fluctuated in usage since the Protestant Reformation but currently is fairly popular in the United States.