Ancestors

Hi, I was just wondering if someone could help me find some information on my ancestors from Norway. I believe they came from Telemarken and possibly from Kviteseid. The oldest information I have is around the very late 1700's to the mid 1800's. His name was Aslak Langlie. They settled in northern Minnesota in the late 1800's from what I gather. I was kind of looking for some family symbols or coat of arms. Any information would be great. Thanks for all of the help.