Yes Ma'am you're probably right. I just went with the name my package was labeled as. I've had two different packages from two different sources with that name. I also remember it being called Thesse O. Most likely someone added the Oxheart name, but most likely the same tomato.
My first source was wintersown and my second source was an individual.
There's also a post you made at garden web about it.
https://www.houzz.com/discussions/21...loniki-oxheart