How do you grieve a person you never met or even knew existed?

My mother’s father died late last year. <br><br>I’ve heard it was due to natural causes and that he’d be in his 60s, but not much else. He was a native of a certain Asian country, my mother is a mix and he was the reason for this.<br><br>When I was little, his wife (my mother’s mother) would explain to me why he wasn’t around. I have few memories of her, since she left when I was 8.<br><br>When I got older my mother and I would talk about that side of my family. We’d end up arguing about it because I wanted to know the truth, or at the very least she’d have been more upfront.<br><br>Now, I feel lost and I can’t stop thinking about my grandfather, even though I don’t know anything about him.