No; in a 2 hour wake, there were probably 150 or more people in total. The awkwardness was mostly having to explain "yeah, you've never met me and he hasn't worked with us for almost a decade, but hey, here we are..."
Not awkward at all. I'm sure the family was touched that you still thought about him after all those years.
My 27 y/o nephew passed away last year. He worked at a mid sized tech firm and many of the folks from the firm showed up at the funeral. His parents really appreciated the folks showing up. So, yeah, not awkward at all.