Irvin Simmons est. b. 1811South Carolina looking for proof of parents, Thanks

Question

Ervin or Irvin is names I see is this the same person I see birth 1811 and 1814 died 1891 need to verify his parents. Thanks

Pickens (Dacusville) or Pendleton area not sure name of area 1811-14 .

Comments

I have him listed as son of https://www.wikitree.com/wiki/Simmons-9541 but don't know when Irvin 1811 passed away or who his wife and children was and this Ervin 1814-1891 I don't believe is the same person 

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Irvin 1840 census has himself wife and one female under 5 SC

Irwin on the 1850 census age 30 Jame Female age 30 James A Simmons 5 and Samuel S W Simmons 3 they was in Georgia 1850

OK I believe this is two different men Irwin maybe Ervin born 1814 or 1820?

But Irvin on the 1840census is Irvin born 1811?

This is what I got any help on this is great. Thanks