Miriam Bridelia Soljak (née Cummings; 15 June 1879 – 28 March 1971) was a pioneering New Zealand feminist, communist, unemployed rights activist and supporter of family planning efforts. Born in Thames, New Zealand, she was raised as a Catholic and studied to be a teacher. From 1898 to 1912, she taught in native schools, learning about Māori culture and becoming fluent in the language. In 1908, she married Peter Soljak, an immigrant from Dalmatia, now part of Croatia, but at the time part of the Austrian Empire. In 1919, because of war legislation, she was denaturalised and forced to register as an enemy alien, because of her marriage. Despite their divorce in 1939, Soljak was unable to recover her British nationality.