Between 1871 and 1876 the family appears to have changed the spelling of their name from "Laverentz" to "Leverenz". On Aug 13, 1870, Louis registered the births of all their children born to that date in Milwaukee. The Laverentz name was used, as it was in the 1870 census. When Emma was born in 1876, the Leverenz spelling was used. Most subsequent census records show this new spelling. [Gustav appears to have usede the variant "Laverenz" for a while.]