I found one more son: Thorvald William Christensen born 5 May 1889, baptized 23 June 1889, Aarhus Vor Frue.
But I do not find his confirmation there, or in Nebsager Vejle so they may have been in yet another location ca. 1903.
The 1911 Nebsager census listed that they arrived there in 1908.
If you have any old letters, photos, etc. that list places in Denmark, that might lead to other birth parishes.