How do you spell hellow in greek?

There's no direct translation of "hello" in Greek that captures the same informal greeting. Greetings in Greek depend heavily on the time of day and the level of formality.

* For a casual "hello," you might use: Γεια σου (Ya sou) - This is informal and used among friends and family.

* A more formal greeting would be: Γεια σας (Ya sas) - Used for strangers, elders, or in more formal settings.

So, there's no "hellow" equivalent, you need to choose the appropriate greeting based on context.