I have spent more than my fair share of travelling of late and indeed I am currently on a train as I type this meagre post. There are, I have discovered, a number of numismatic, or associated, biographies on Wikipedia. Some are merely stubs but others offer quite an insight into the lives of people, the only knowledge of which we normally have is through their published works:
Philip Grierson (largely sourced from interviews printed in Spink's Numismatic Circular)
Lord Grantley (very brief)
Lord Stewartby (very brief)
John Watts de Peyster Wrote an interesting monograph on Carausius and is, perhaps, more of a historian than numismatist
Joseph Hilarius Eckhel
William Henry Waddington
Laurie Bamford A wonderfully colourful sketch of a collector of British coins, beer enthusiast and singer in a punk band. A worthy wiki biog and one that I would have been proud of.
Sir John Evans
Max von Bahrfeldt
There are probably others and I hope that this encourages some of you to explore further.