Overview
Father of the House is a title that has been traditionally bestowed, unofficially, on certain members of some legislatures, most notably the House of Commons in the United Kingdom. In some legislatures the title refers to the longest continuously serving member, while in others it refers to the oldest member. Recently, the title Mother of the House or Mother of Parliament has also been used, although the usage varies among countries; it is either the female alternative to Father of the House, being applied when the relevant member is a woman, or refers to the oldest or longest-serving woman without reference to male members.
United Kingdom
The Father of the House is a title that is bestowed on the senior member of the House of Commons who has the longest continuous service. If two or more members have the same length of current uninterrupted service, then whoever was sworn in earlier, as listed in Hansard, is named as Father of the House. Traditionally, however, the qualifications used for the Father of the House are not entirely clear and may have included the oldest member, the member with the longest aggregate service, or the member who entered the House longest ago. The first recorded usage of the term dates to 1788, in an obituary of Thomas Noel. In 2017, Harriet Harman was described as "Mother of the House" by Prime Minister Theresa May, in recognition of her status as the longest-continuously serving woman MP.
The only formal duty of the Father of the House is to preside over the election of the Speaker of the House of Commons. The Father of the House may also participate in ceremonial events, and is the second member to be sworn in after the Speaker.
From Wikipedia (CC BY-SA 4.0).