I think there was an entire episode of Ancient Aliens that delved into this subject. Dogon tribe, dog, Sirius star, dog star, etc.
They noted the word ‘dog’ was spelled and spoken similarly by many ancient cultures across the world, but nobody knows why because the cultures had no contact with eachother.
In an extinct Australian Aboriginal language, Mbabaram, the word for "Dog" is almost exactly the same as the English word for "Dog". The similarity is a complete coincidence. (en.m.wikipedia.org)
…the Mbabaram word for “dog” was in fact dúg, pronounced almost identically to the Australian English word…