Sources

Ros-neo’idh Watson 1904, p. lxiii
rudha Roisneoidh 1904 Celtic Monthly xii, p. 137
“For the contraction we might compare Ros-neimhidh, spelled already in 1225 Rosneth (in Reg. of Paisley, Neueth, Neyt, Rusnith), now Rosneath.” Watson 1926, p. 55
‘Gaelic nemed (neimhidh now), “a sacred place,” which we have also in Rosneath.’ MacBain, p. 308
roʃnióˈi / Ros Nˈi̪óˈi Diack MS2276
Ros-nithe Watson CW9