What is the correct pronunciation of the surname Voegele?

I think it is Foeglay

It depends on which language the name was originally in, and whether it is now pronounced (in the USA or in Britain) in an anglicised form. It looks to be of Germanic origin - the Germanic rendering is close to 'Fer-ge-le' where the 'ge' and the 'le' are almost 'fer' and 'ler', but not quite so definite.