Philatelist is a common term, but strictly speaking, a philatelist studies stamps, but doesn't necessarily collect them, so Stamp collector would be more accurate!
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There does not appear to be a name for it.
Weird
Quodophile.
Some of the names given for a person who collects trains:model train collectormodel train enthusiasttrain modeler
Gun-collector
Arachnid collector or Arachnophile.
simple - eraser collector!
A Pottea.
Someone who collects everything would be called a hoarder - this type of person may have OCD as well.
notaphilies
A coin collector.AnswerMany of us claim to be students of the art and history of coins and coinage and prefer to be called numismatists.
That's an entomologist.