In the 1840 Cannon Co. census, there is a listing for Elisha TEDDER who appears to be 60-70 years old. There are 13 other people in the household with him.

1 male 0-5
2 males 5-10
1 male 10-15
1 male 15-20
1 male 60-70
1 female 5-10
1 female 10-15
3 females 15-20
2 females 20-30
1 female 40-50


In Cannon Co. Marriages:
Mary TEDDER to Daniel Travis May 19, 1842
Mary C. Tedder to James Mears Nov. 14, 1848
Thomas TEDDER to Miss Rhoda Sauls March 26, 1846

In Cannon Co. Land Deeds:
Deed Book G, p. 100-101
Thomas TEDDER and wife Rhoda, formerly Sauls, to A.D. ALEXANDER their interest in 68.5 acres which John K. Sauls died seized and possessed of. 29 May 1849.

Just based on census and marriage records that I looked at online... my guess would be that the Tedder's of Cannon Co. TN came from Cumberland Co. NC and migrated for the most part to Benton Co. TN.

I am not related, just did some lookups for you. If I can help you further, just email me.
Kristi Moffitt