Sadb Sulbair (§ 6):  Gaul. svadu in Svadu genus, Svadu-rix; Skr. svadu, "sweet"; Gr. ἡδύς, "sweet"; L. suâvis, "suave"; Eng. sweet.  Sulbair is cognate with Cym. Hylafar, "eloquent." (Fled Bricrend: the Feast of Bricriu, Henderson, 1899).

...Finn had two sons, Fergus and his more famous brother Ossian.  Fergus of the sweet speech was the Fenian's bard, and, also, because of his honeyed words, their diplomatist and ambassador.  Yet, by the irony of fate, it is to Ossian, who is not mentioned as a poet in the earliest texts, that the poems concerning the Fenians which are current in Scotland under the name of "Ossianic Ballads" are attributed.  Ossian's mother was Sadb, a daughter of Bodb the Red.  A rival goddess changed her into a deer—which explains how Ossian got his name, which means "fawn." (The Mythology of the British Islands, Squire, 1905).