Saintpaulias or African Violets.
This is a very common house plant, I have three different colors of Saintpaulia.
It is estimated that there are about 50 000 different Saintpaulia varieties.
The interest in the plant has grown a lot over the world, there is for instance the African Violet Society of America, the Swedish African Violet Society, the Finnish African Violet Society, there is in Canada, in Romania, in Russia and maybe in a lot of other countries too.
Even on Facebook: African Violet World.