Divergent Evolution
Differing from convergent, evolution that is divergent WILL come from a common ancestor. Other species might come from this, but they’ll have some relation to each other. This can even happen if the traits they have aren’t completely similar. The best way to explain this is with the vertebrae limb, which differs a bit in many species. Whales, Humans, and Frogs clearly are not the same but they actually connect in some form.
Since we all have vertebrae limbs, with the whales having flippers and frogs having forelimbs, it is clear this evolved from an ancient jawless fish. Even our arms, though not flippers or forelimbs, connect. Meaning we have the same fish ancestor as the whale and frog. Science refers to these as homologous structures. As they are related in spite of wild variations. Crazy, huh? Of course, science separates divergent evolution into four major species. Those are the Allopatric, Peripatric, Parapatric, and Sympatric.