As I said, the article is incorrect, and so are you, sorry :)

What Friedman and Lemaitre had in common was the equations for describing an expanding universe, which they arrived at independently. In addition to that Lemaitre calculated, what later became known as, the Hubble Law. Lemaıtre’s model was similar to Friedman's but it was Lemaitre who first gave physical meaning to the singularity described by Friedman as mathematical. It was Lemaitre, who in 1931 first put forward the idea of the "hypothesis of the primeval atom" or "cosmic egg," which is the actual theory of the Big Bang. Would have Friedmann eventually arrive at the same conclusions? Probably. But he did not. So, Lemaitre is the father, as in, progenitor of the theory.

I hope your are not ashamed of a Catholic priest making a game-changer contribution to science. :))