Oller and Ollar are variations of the same line in some cases.
If I have right line - then we are distant cousins. Was your Thomas Arthur Oller born in 1913 in Hughes County, Oklahoma and died in 1959 in Cheyenne, Wyoming?
If so, then Thomas was the son of William Benton Oller and Margaret Jane Sizemore.
William Benton was the son of William Jess Oller and Matilda Armenia Jones (sister to my 3rd great grandfather. Let me know if this is your line - I have photos of Matilda and William Jess I will share with you.