Hello! I know your message is old, but I hope you still get this. We are new to Ancestry.com and researching our Au family roots. My father is named John Peter Au and his father was William August Au -- and we were all from/born in New Jersey (Phillipsburg area), so your post makes me think there is a connection between us somehow.
If you get this message, please let me know! Would love to share research! --Linda Mae Au (Parker)