Officer of 91th infantry Dvinsky and 92th infantry Pechorsky regiments. Валериан Карлович Яухци. Rare family name. Didn't find info about his ancestry except he was Orthodox Christian. Could be from Estonia?
http://russianestonia.eu/index.php?titl ... 0%B8%D1%87

Found his father: http://erb.nlib.ee/?kid=24999027