Guglielma / Wilhelmina / Guillemette / Vilhelmina

Guglielma is the Italian feminine form of the Germanic name Wilhelm, which is composed of the elements 'wil' meaning 'will, desire' and 'helm' meaning 'helmet, protection'. The name has a long history in Europe, particularly in Germanic and Romance-speaking regions. While the masculine form William became extremely popular after the Norman Conquest of England, the feminine forms like Guglielma remained more prominent in continental Europe, especially Italy.

The name Guglielma gained some historical significance through figures like Guglielma of Bohemia, a 13th-century mystic who founded a small religious sect. Her followers believed she was the incarnation of the Holy Spirit, and after her death, she was venerated as a saint by her adherents, though she was later condemned as a heretic by the Inquisition. This association, while controversial, contributed to the name's historical footprint.