JC Hawver at In-N-Out

So I found out not too long ago that JC Hawver (1854-1914) used to live on the property that is now the In-N-Out parking lot in Auburn, CA. Here is one of the articles relating to his house being torn down: http://auburnjournal.com/detail/94885.html

So I decided to go up and take a picture of a plaque that was mentioned in the article above. Based on the research of others, I believed JC stood for John Christopher, the names of his 2 grandfathers. But on the plaque it says John Carpenter, so now I'm wondering where they came up with that name.