Miller’s brother-in-law, D.J. De Pree. A bit of family history: De Pree also founded the Herman Miller Clock Company in 1926 but turned it over in 1937 to Howard, who renamed it. As for the identity of Herman Miller, he was Howard’s father and De Pree’s father-in-law. The Miller companies are not affiliated but stand across the street from one another in Zeeland, Mich.