The name "Somonauk" is of
Pottawatomie origin. The name is most likely derived from the phonetic phrase
As-sim-in-eh-kon, which translates to "pawpaw grove", in reference to the vast groves of
pawpaw trees that filled the area at that time. The
Second Treaty of Prairie du Chien, signed by General
John McNeil Jr., Colonel
Pierre Menard, and
Caleb Atwater for the United States on June 29, 1829, references four sections of land being reserved for Chief Awn-kote and his band of 171 villagers "at the village of Saw-meh-naug along the Fox and Illinois Rivers". The
Saw-meh-naug, along with the other Pottawatomie of the Illinois River (known as the Prairie Group), as well as the Sauk and the Chippewa, had aided the U.S. in the
Black Hawk War. After the war, as a thanks to the Pottawatomie, the U.S. Government signed a treaty allowing the Prairie Group tribes to continue to hunt on U.S. land, outside of their allocated reservations. However, due to "rumors of the Pottawatomie being restless and committing depredations in the northern part of the state spreading to central Illinois", and white residents of the state feeling uncomfortable, the Governor "gave the Prairie Group an ultimatum to leave Illinois". By the end of December 1833, the Pottawatomie had left Illinois, and the settlements of the Pottawatomie were free to be claimed by white settlers. It's also widely known that this church was a stop on the
underground railroad. Later, in 1836, the post office for the settlement of Somonauk was moved to the intersection of Chicago Road and Somonauk Road and the name would be changed to "Somonauk Crossing". Another post office was established in 1850 on Somonauk Road at present-day Buck Lake, and was known as "Buck's Branch". In 1851, the CB&Q railroad finally made its way through the township, and in 1853, built a station along the line 5 miles south of the early settlement (now known as "Franks"), just north of the
LaSalle/
DeKalb County border. With that, the name "Somonauk" would make one final move to its current location, being in platted in 1855, and
incorporated in 1865. "Somonauk Crossing" then became known as "Freeland Corners". The name of Buck's Branch would change to "Somonoc Depot" for a brief time before the post office was moved to the actual Somonauk railroad depot in December 1855. The closing of "Freeland Corners" post office was such a hardship to the farmers of Freeland Corners and Somonauk Crossing, that they petitioned the Post Office Department to establish another office in the location of Frank Richey's creamers, and that it be called Frank's Post Office. A post office was established in November 1891, once again located in the area of Chicago Road and Somonauk Creek, this time, on the west side of Rimsnider Road, just north of the creek. The post office was discontinued in April 1902, lasting a mere 11 years. ==Geography==