I find people, though mostly US people, and yeah, his online activity drops off in late Nov 2014. You can easily find several of his presences, including on HN,

I find people, though mostly US people, and yeah, his online activity drops off in late Nov 2014. You can easily find several of his presences, including on HN, under the handle jezchatfield. For whatever reason, he reminds me of edw519, who used to be quite well-known around these parts. I reached out to Jeremy's family members and linked to this thread. Will update if I hear back.