According to "Deuel County History", the book I have, the county was named after Harry Porter Deuel (1836-?), a prominent Omaha citizen and agent for the railroad. He was well known in social circles and was very involved in Masonic work.
At the time when he resigned from the railroad in 1901, he was then the oldest railroad man in continuous service in Omaha, and one of the best known passenger men in the West.
In 1858, he married Frelove Jane Miller; their children were Blanche L. (died at 19yrs), and Charles L. Deuel. Charles married Mary Lake, and their two children were Lake and Blanche.