Maurice Holmes's compilation of records on early landowners in
Decatur Co, 1820-1835, is still, to my surprise, available for sale.
A list of all the surnames in the book is online at
http://www.yogs.com/in/surnames/Decatur_Landowners.html
The list of surnames in Colleen Ridlen's Rush County Marriages,
1822-1835, is at
http://www.yogs.com/in/surnames/Rush_Marriages_1822-1835.html, her
Ripley County Marriages, 1819-1839 at
http://www.yogs.com/in/surnames/Ripley_Marriages.html and her
Jennings County Marriages, 1818-1840 at
http://www.yogs.com/in/surnames/Jennings_Marriages.html