I'm not certain, but I may have a connection to your Neffs.
One of my great grandfathers had an older cousin, Joseph W Kelly, who died in Whatcom County in 1924. His wife, Katherine was listed as a surviving sister of a Neff male on the Whatcom County site, on the US Gebweb.
Joseph's obitury lists when he arrived in Bellingham & that he later moved to Acme & owned & edited a newspaper there.
Joseph W Kelly was from Kosciusko County, IN.
If this sounds right, check the Whatcom County site for obituaries.