Henry Hudson
An explorer who mapped the majority of Northern America and has Hudson’s Bay named after him. He was tasked with finding a northern passage to Asia, but never found it. While sailing back to the New World, he hit a harsh winter and his crew staged a mutiny when he refused to turn back.
No one knows what happened to him after that. The crew claims to have set him adrift with provisions, but there’s no evidence of what happened to him after that, in the Canadian wilderness.