Daniel Erastus Pierson

this is my great grand father his name is Daniel Erastus Pierson he was married to Ida Luella Whitney. I am looking for his parents or better pics of him and his wife. their children where Myrta May,Fred Martin, Minni Maybelle,Fay Edgar Eva Lucille. I think his parents are Edgar M Pierson and Elizabeth A ?.but cant find proof please help me.