The Mefford / Platz Connection

I believe I have found my husband's (Larry D. Mefford) ancestors back to their arrival in the United States during the 1750's. There are some descrepancies about whether the first Mefford connected to our family in the US was George Conrad or Andreas Conrad, so more information is needed to clarify that. My Platz heritage has been traced only as far as my great-great grandfather, Phillip Platz. He died in Douglas County, Kansas, and was born in Pennsylvania about 1824. My information stops at that point. I do not know his father or mother or brothers and sisters. Anyone having information on either the Mefford or Platz families is welcome to contact me for an exchange of information.Frankie (Frances Rae) Platz Mefford