Treos e Treo

Treos en Vimianzo é a parroquia de San Miguel de Treos onde está o dolmen de Pedra Cuberta.

treo, m. (gs. ~, pl. ~nna).1. (a) Direction, way. I ngach ~, i ngach aon ~ baill, in all directions, everywhere. Sa ~ sin, in that direction. D’fhéach sé sa ~ eile, he looked the other way. Ghabh mé an ~ aon uair amháin, I passed that way once. Ghabh sé an ~ ó chianaibh, he passed by a while ago. Cén ~ a bhfuil aghaidh an tí? Which way does the house face? I d~ na talún, na farraige, landward, seaward. Bhuail sé i mo threo, he came my way, I chanced to meet him. Cé a chasfaí i mo threo ach an fear é féin? Who should I meet but the man himself? I d~ éigin timpeall orainn, somewhere around us. I d~ (is) go, in such a way that, so that. (b) Trend, drift. ~ srutha, direction of current. (c)Geol: Strike. 2. (a)I d~ (do), close to, along with. I d~ an mheán oíche, towards midnight. I d~ an dorais, towards the door; near the door. Chuaigh mé i d~ dó, I went close to it, I nearly succeeded. Bhí mé i d~ do bheith chomh maith leat féin, I was nearly as good as yourself. (b)Cuir i d~ a chéile iad, put them close together. Táimid i d~ a chéile ó mhaidin, we have been together all day. D’fhan mé tamall ina d~, I was along with them for a while. 3 = treoir

treoir, f. (gs. -orach, pl. -oracha).1. Guidance, direction.

Así que o camiño na época celta estaba en Vimianzo. O s si que pode ser unha deformación da palabra.

Pero é coa palabra treo que sae mellor a conexión:

treo substantivo masculino1 Marítimo Vela cadrada ou redonda que nas embarcacións de vela latina permite navegar en popa con ventos fortes. Di a RAG.

Treo é a vela que  permite guiar, navegar e seguir a dirección con ventos fortes?