Are there multiple Godzillas in the Godzilla universe?

You need to consider that there are multiple godzilla universes. We have the showa series where there is Godzilla and that abomination that came out of that one egg. We have the Heisei universe where he came back from the dead? (I CANT REMEMBER SEND HELP) which also has G Jr., Biollante, and Space G. And every Millenium era G film barring the Kiryu movies, has their own universe. We also have the new American G series,  Shin-Gojira, as well as the IDW verse.

Varan04276,
The Heisei Godzilla is a creature mutated from a Godzillasaurus and completely different from the one that attacked in 1954.

Ahh, thank you

And don't forget all of the baby Godzillas, of which there were three, I believe. 

Well including the young Godzillas there are three Godzillas in the Showa series, three in the Heisei, two in the GMK timeline, two in the Kiryu timeline and likely two in the Final Wars timeline... That we know of anyway.

It's possible there are others, but that we know of there seems to be only one Godzilla in the G2K and GxM timelines.

Actually there are three different Godzilla universes: Showa,Heisei and Millenium.Each with it's Godzilla (Not counting Millenium) and with it's own origin.But Millenium has different stories and origins of Godzilla.

Am I the only one who remembers that Legendary stated that in its Monsterverse, Godzilla is the last of an ancient species that lived during the Permian period?