What is "vulcana"

Kate Williams (1875 – 1946), sometimes called Kate Roberts, better known by her stage name Vulcana, was a Welsh strongwoman born of Irish parents in Abergavenny, Monmouthshire.

With strongman William Hedley Roberts, better known as Atlas, she toured music halls in Britain, Europe and Australia; the couple performed as The Atlas and Vulcana Group of Society Athletes.