Is Yamoshi a bardock?

Yamoshi is actually Bardock : r/dragonball.

Is Broly Yamoshi?

You guys probably remember the image of Yamoshi from the ritual and legends shown in Battle of gods and say “That looked nothing like Broly. That looked more like Vegeta.” You would be correct, but the truth is, that was just a representation of him. He was a recycled character model.