In 2003, Tracey said, "my great grandfather was bogos domdebedian, changed his name to thompson. possibly came into the us illegally form canada. any info?"
Hi, Tracey, have you had any more luck finding your great-grandpa? If you have any more info, it would help people help you. For instance, what century, and where, was your great-grandpa born? Can you tell us what year your grandpa was born, and where, and what HIS name was? That would help people locate your great-grandpa. A wife's name or his parents' names would be helpful too.
Also, how certain are you about the spelling of his original name? Perhaps you can ask your oldest relatives how he spelled it. I can think of another Armenian name that sort of sounds like that, but many Armenian names are very close in sound and spelling, so it's best to double-check.
Finally, be sure to put info in the caption that helps people figure out what you need; more than just the last name. Good luck!