From Latvian Surname Project
Aderkaši was an estate in central Latvia, located in Taurupe parish. The estate was created prior to 1687, but the manor house no longer exists today. Some of the subsidiary peasant farms still survive.
The surnames found in the 1826 revision list for Aderkaši, written as they appear in the document: Āboliņš, Anderson, Aping, Atslehg, Baidak, Balod, Bardak, Behrsin, Beiroth, Bisen, Blau, Eglit, Grawiht, Grikkit, Janson, Kahsit, Kalning, Kaming, Karklin, Kirsit, Krumin, Kwesit, Lahz, Lappin, Lasding, Leping, Liezit, Linning, Luhse, Meesit, Michaila, Osolin, Peterson, Pumpur, Pupain, Rambach, Rangard, Rubben, Rudsit, Sakalow, Sarkann, Sarring, Sillin, Smilga, Skudre, Skuije, Smider, Soundberg, Swirgsting, Tehraud, Tupiten, Uppit, Woitow.
The 1826 revision list is one of the earliest sources for the surnames of Aderkaši.