Two dogs were shot into orbit by the Soviet Union in 1960, aboard Sputnik 5, they were named Belka and Strelka. A bunch of other small animals and plants were also on board, but I don't know their names.
Belka translated literally means squirrel, but is more likely Russian slang for "whitey". Strelka is Russian for "streaker" or "little arrow". Strelka later had six puppies with Pushok "Fluffy" m. a male dog who participated in many ground based space experiments. One of these puppies, Pushinka "Fluffy" f. was given to President Kennedy’s children by premier Kruschev.