Placing Osveril's goings-about on this timeline might need some guesswork. In terms of major world events, the best points of reference I have are the Sculptors starting to gain knowledge of alchemy, which follows Teknall and Toun's visit to Jvan and presumably precedes his birth, and the Pronobii resurrection, which follows it by a moderate(?) spell (Termite doubtless knows better than me where it would go). Overall, though, I'd say the birth wouldn't have happened later than 5 PR, if only because it was still the last turn. This should currently put Osveril in late 5 to early 6 PR at most.

In short, Osveril and time still have a tense relationship. Do correct any blunders I may have made there.