Historically Welsh mathematicians, like many UK scientists, have tended to be white and male. In future this is likely to be very different! To see a diverse selection of top mathematicians, see our Careers in Mathematics videos.

**Robert Recorde 1512(?)-1558**

Born in Tenby, the inventor of the equals sign (=) and author of books on mathematics for ordinary people: an inspired teacher

**William Jones 1674-1749**

Born in Llanfihangel Tre’r-beirdd, Anglesey: mathematician who introduced the symbol π to represent the ratio of the circumference of a circle to its diameter. A close colleague of Isaac Newton.

**Richard Price 1723-1791**

Born in Llangeinor (Cwm Garw, near Bridgend): philosopher, preacher, radical and mathematician, who established the Bayes-Price equation as the basis of the mathematics of insurance.

**William Morgan 1750-1833**

Born in Bridgend: a doctor and mathematician who established work as an actuary as a profession.

**Griffith Davies 1788-1855**

Born in Y Groeslon, Arfon: mathematician and actuary, highly respected for his charity and benevolence.

**George Hartley Bryan 1864-1928**

Born in Cambridge, his career was spent at Bangor University: an outstanding mathematician who published *Stability in Aviation *in 1913, the basis of the science of flight.

**Bertrand Russell 1872-1970**

Born in the village of Trellech, Monmouthshire: philosopher, logician, mathematician and campaigner for peace: he sought to establish arithmetic on a firm logical base.

**Lancelot Thomas Hogben 1895-1975**

Born in Southsea, Hampshire, and adopted by the village of Glyn Ceiriog: an experimental zoologist and medical statistician who popularised mathematics and science.

**Evan James Williams 1903-1945**

Born in the village of Cwmsychbant, Ceredigion: a physicist who used mathematics to analyse the atom.

**Donald Watts Davies 1924-2000**

Born in Treorchy, Rhondda: a computer scientist who pioneered the method of packet-switching to transfer data; the godfather of the modern internet.

**Mary Wynne Warner 1932-1998**

Born in Carmarthen: a mathematician who ‘made precise the property of imprecision’, shattering the gender glass ceiling.

**John Frankland Rigby 1933-2014**

Born near Manchester, his career was spent at Cardiff University: a remarkable geometer and educationist.