James Wiegold (15 April 1934 – 4 August 2009) was a Welsh mathematician.

Born in Trecenydd, Caerphilly, he earned a Ph.D. at the University of Manchester, England in 1958, studying under Bernhard Neumann, and is most notable for his contributions to group theory.

Wiegold died from leukaemia on 4 August 2009, in Penarth, Vale of Glamorgan.

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