[name_f]Bronwen[/name_f] (the appropriate way to spell it) is on my list with the nickname [name_f]Bonnie[/name_f]. The nickname [name_f]Winnie[/name_f] has been growing on me. Could [name_f]Bronwen[/name_f] work as the full name or would spelling it [name_f]Bronwyn[/name_f] lend itself a little more easily?
Nono, spell it [name_f]Bronwen[/name_f] 
[name_f]Winnie[/name_f] would definitely work as a nickname for [name_f]Bronwen[/name_f], though I do like [name_f]Bonnie[/name_f] more 
I can see why one would argue that [name_f]Winnie[/name_f] would not be a fitting nickname for [name_f]Bronwen[/name_f], but I wouldn’t agree. I think it totally works, and I pronounce it more like [name_m]Bron[/name_m]-[name_u]WIN[/name_u] than [name_m]Bron[/name_m]-WHEN anyway.
I think it works, but I like [name_f]Bonnie[/name_f] or [name_f]Bee[/name_f] better.
[name_f]Bronwen[/name_f] with the nickname of [name_f]Winnie[/name_f] makes sense to me - and I like it!
I think it makes perfect sense, but then I had [name_f]Winnie[/name_f] on my list for other -wen names. ([name_f]Branwen[/name_f], [name_f]Anwen[/name_f], and Rhoswen).
But it’s Welsh and that’s not how you say it… 
Everyone who can speak English can say ‘when’ so this wouldn’t be an accent thing. It would just be a choice to use the wrong pronunciation.
Anyway, if you want to nickname a [name_f]Bronwen[/name_f], [name_f]Winnie[/name_f], then fine but don’t change the spelling or sound of the name to accommodate it.
[name_f]Bronwen[/name_f] with the nickname [name_f]Winnie[/name_f] is gorgeous! Plus, I pronounce it [name_m]Bron[/name_m]-win anyways, so the nickname [name_f]Winnie[/name_f] would fall right in line. [name_f]Winnie[/name_f] is also the nickname for names like [name_f]Gwendolyn[/name_f], and you don’t have a heavy “win” sound in that name, either. I wouldn’t change the spelling just to force a nickname, especially when [name_f]Bronwen[/name_f] itself is very, very pretty. As for [name_f]Bonnie[/name_f]…not so much. I find it dowdy and tired, whereas [name_f]Winnie[/name_f] has this adorable vintage vibe that I just love. [name_f]Winnie[/name_f] is on my list of names that I simply adore!
I know a few Welsh girls with the Bronwyn spelling, who pronounce it with a ‘win’ ending, as well as my grandmother, who is half Welsh - I don’t think it’s a matter of being correct or incorrect, it’s just a matter of two different ways to pronounce the same name. It’s a bit like Evelyn - normally, Evelyn is ehv-eh-lyn, but plenty of people in the UK seem to pronounce it as eve-lyn. Or Esme being pronounced as Ez-mee in the majority of the United Kingdom (from what I understand) rather than Es-may. It doesn’t mean that they’re choosing to pronounce it wrong, it just means that regionally, there’s more than one way to say it.
Definitely! I love it!