1. Herman Henry Hittenberger (*1855 Niederwoellstadt/Hessen +1937 California)                    photo: his house in Oakland (about 1894) - described in one of his letters
2. Herman Henry Hittenberger's father Georg Hüttenberger (*1831 Gross-Umstadt,                           +1900 Pfungstadt) in his job as a geometer and his half-brother Ludwig Hüttenberger (*1871,+1945 Pfungstadt) working as a geometer,too, in a photo of c.1895.
3. Philipp Hittenberger
4. others