Here is a sound file (~40K) where I try to pronunce the
name 'Snæbjörn Hákonsson':
www.geocities.com/jepe2503/snaebjorn.wav
I hope that it will help to some extent. It is not an exact Old Norse
pronunciation, but has there ever been a standard? Of course not, so
my pronunciation would probably be consider as a not too strange
dialectal pronunciation by a 13th century norseman.