Abraham & Maria Ohmundson

Just started tracing my Dad's maternal side, and just discovered Norwegian ancestry, so I'm clueless about culture and language. I've found them on board the brig Favoriten out of Stavenger... and have a great deal about them after that, Iowa to Texas (they changed their name to Brown, so wasn't easy) but still no naturalization info, or info about them from Norway. Any advice for a newbie appreciated, I am trying to learn the system and find their parish, church..etc. ID 72910 Abraham Ohmundson 36 m ID 73011 Maria Ohmundson* 33 f ID 73112 Rachel Abrahamsdatter* Ohmundson* 14 f ID 73213 Borne Abrahamsen* Ohmundson* 13 m ID 73314 Alexander Abrahamsen* Ohmundson* 11 m ID 73415 Peter Abrahamsen* Ohmundson* ?? m ID 73516 Martin Abrahamsen* Ohmundson* ?? m ID 73617 Carl Abrahamsen* Ohmundson 1 m ID 73718 Sophia Abrahamsdatter* Ohmundson* 9 f ID 73819 Maria Abrahamsdatter* Ohmundson* 2 mos f