searching for more Karlstads

I am just curious about my roots. So far I have been able to track a few people, but looking for more! I know that Herman Karlstad married Augusta christeansen and they had at least ten children. Their names are: Harold, Ales, Karen, Elise, Severin, Otto, Arne, Sofie, Martin, and Ole. I am wondering if there are more siblings. Also wondering who Herman's parrents are. Wondering about all these children's families except Otto's. If anyone knows them please contact me. My email is [email hidden] Thanks!!