"Nelson F Twigg married Mary Elizabeth Summers Knox in 1880 in Shelby County, Il. Believe parents of Nelson was James and Margaret (Meeker or Meekes) according to their marriage record."
Your message is old so I don't know if you'll receive this reply, but Nelson was probably born in Bloom twp. of Fairfield Co., Ohio.Parents James and Margaret were there in 1850 and 1860, and by 1870 his wife is found in Shelby Co., IL.I couldn't understand why another son, John, stayed behind as in 1870 he's still in Bloom township.However, since you mention Nelson's mother may be a MEEKER, this makes perfect sense.The family that John stayed back with was that of Aaron and Mary A. Meeker.
CENSUS: 1870 Bloom Twp., Fairfield Co., OH; visitation 128/132 MEEKER, Aaron, 75y infirm b NJ ", Mary A., 65y keeping house b VA ", Aaron, 22y farmer b OH TWIG, John 13y works on farm b OH MEEKER, Caroline 25y helps mother b OH ", Harvey J., 31y farm laborer b OH ", Rosa, 18y keeping house b VA ", Marietta, 1y at home b OH ", Elizabeth, 40y helps in house b OH