The Guild of One-Name Studies is the worldwide centre of excellence in one-name studies and promotes the interests of both the individuals and groups who are engaged in them.

Established in 1979 and registered as a charity in 1989, the Guild provides its members with the means to share, exchange and publish information about one-name studies as well as encouraging and assisting all those interested in one-name studies by means of conference, seminars, projects and other activities.

On 16 February 2022, the Charity Commission registered the Guild of One-Name Studies CIO. The Registered Charity Number is 1197944.

The Guild vision statement is defined as: The Guild will strengthen its position as the centre of excellence for surname studies by educating the public and worldwide genealogical community in one-name studies and empowering members to preserve their knowledge and share their expertise.