Registries are not a common phenomenon in Greece, and I’m not too sure why. Ever since I’ve been going to weddings, people wil just for envelopes of cash or checks. This is super normal in Greek culture and is considered much easier than either but gifts that people don’t need or setting up an entire registry. On top of that, many older Greek people are not super tech savvy and it would be difficult for them to navigate an online registry. Just something to know when attending any Greek weddings!