Her mother, born in Pluguffan in 1909, sang and her grandmother Marijan Arzul, a dressmaker who runs a village hall, is known to sing all the time, as is her uncle Bili, singer and bugle player.

Then, she becomes almost naturally militant of the Catholic agricultural youth (JAC) and followed many courses there; She led a group of Scottish and Russian dances there, learned and perfected singing, discovered Gregorian chants and cinema.

[1] In 1956, after registering for the "Bleun-Brug" holiday song contest in Combrit, Ar Goulih won first prize, which she repeated three times in a row, in 1957, in Locronan and Pont-l'Abbé in 1958.

[4] She discovered Barzaz Breiz and traditional songs from the Vannes region thanks to people like Donatien Laurent, Yvon Palamour, Gwennole Le Menn.

[5] Ar Gouilh, who sang at the wedding of the president of the JEB, Jean-Jacques Kerdiles, met Georges Cochevelou, Alan Stivell's father, who asks her to sing accompanied by his son on the Celtic harp he built.

[11] Years of fighting finally, for Brittany of course, but also for simple and universal ideas, with commitments which find source in the work of libertarians and free spirits like Émile Masson or Glenmor.

Ar Gouilh had the privilege of a surprising musical encounter, when there she sang Genovefa Rustefan, a song by Barzaz Breiz, accompanied by musicians from the national orchestra of the Republic of Tuva.

[15] In 1997, Ar Gouilh sang O Keltia and E dibenn miz gwengolo for a tribute paid to Glenmor one year after his death, which resulted in a Da enoriñ collective in 2000.

[17] In 2008, she recorded a synthesis of a lifetime's work during a recital in Quimper Cathedral, with Michel Boédec on organ and piano, Pol and Hervé Quefféleant on harps and Xavier Lecomte on violin.

[18] This album entitled Voix de Bretagne, released by Label Production by Jakez Bernard, contains 8 songs from the Vannes region, 3 from the former bishopric of Tréguier and 2 from that of Quimper, as well as 4 more recent compositions (Glenmor, Hélias, Gwernig).

[20] On 23 July 2011 during the Cornouaille festival in Quimper, Ar Gouilh, who resides in Douarnenez received the collar of the Order of the Hermine by the Cultural Institute of Brittany.

Since 2011, she has participated in the tribute show Glenmor l'Insoumis/Disuj, performed in Lesneven, Rennes, at the theater in Vannes and at the Palais des Congrès in Pontivy[21] as well as in festivals (interceltique de Lorient, Cornouaille 2013).