Have you any further infomraion about your Holter family? I have been researching a man called John Nordin from Sweden and found out that he was married in Ashland with Elizabeth Holter. She was earlier married to John Holter, born 1865 in Norway. William Marvin Holter was born in her first marriage. Elizabeth was born in Finland according to the census, but it seems that she spoke Swedish. I'm trying to find out what happened to John Nordin. I haven't found when he died and he was decleared dead in Sweden in the 60's. We didn't know that he was married on we found his marriage records on FamilySearch.
Hope you see this message although it is 13 years since you wrote your message.