User:SOTO/Forum Archive/The Reference Desk/@comment-24105943-20131029015133/@comment-188432-20131119030442
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It's a good question, and certainly something I wondered about. However, no narrative addresses this. All we can really do is lay out the known facts.
The Snowmen happens at Christmas 1892. Human Nature is 1913 — that is 21 years later. It's therefore easily suggestible that Captain Latimer could have remarried and had a son in the very late 1890s who could have grown up to be Tim. Or Tim could be a lateral relative, like a nephew or younger cousin.
The possibility of a relationship certainly exists. But it would be pure speculation to assert it as fact.
