Better wait for Ms Merriment for this one - she's fabulous.
My (related query is: I have seen in print the confident claim that the girl's name
Lynnette is derived from
Eiluned. This would give a clue to the pronunciation, no doubt.
It looks a bit remote from reality, though. I wouldn't be surprised if
Lynnette was a dim. of
Helen, or simply of good old
Lynn. Does anyone have any ideas?
All the best