this article gives says there were 5 girls and 2 boys in the family rather than 6 boys and one girl
https://www.folkmusic.net/htmfiles/inart536.htm - a review of a CD of archive recordings of Seonag Nic Coinnich (Greentrax9019, SINGING WITH THE SOUNDS OF THE SEA)

"The youngest of five sisters and two brothers, Uilleam MacCoinnich (William MacKenzie) was born in 1857 in Shader, on the peninsula of Point on the Isle of Lewis. Like his father and grandfather before him, Uilleam built a house on the croft and there, as a crofter and fisherman, raised his own family. However, following the emigration of his surviving sons and the death of his wife, Uilleam was forced to emigrate to Canada where he settled in Fort William, Ontario, and where he died in 1908. The sorrow of this departure and his awareness that he was never again to see his beloved Isle, sparked in Uilleam a profound sense of loss that he turned toward the creation of laments and other verse of immense power and beauty.

"It is ironic that in Canada he was considered by many of his contemporaries to be only of the status of bard balle, or a village Bard, one not fully worthy of the grand title Bard.

"Uilleam’s artistry was eventually fully recognised following the publication by his family (in 1936) of his verse in a commemorative volume "Cnoc Chùsbaig", and songs from this collection are shown in all their glory on this recording. In particular, the last track of the CD is Uilleam's song "An till mi tuilleadh a Leòdhas" ("Will I ever return to Lewis?"). This song, which contains some of The Bard's most powerful writing, was written in Canada and speaks of the Bard's longing to return to his native district, praising the beauty of the hillock Cnoc Chùsbaig, close by the family croft. Uilleam’s wish in the song is that one day all his family will be united there again in song."