Lost Grandfather

Looking for family history of our grandfather:
EDWARD RAVATO? GREEN/GREENE/GREENOGE,
He had a half-brother named:JAMES WALTER NASH
AUSTIN (see Mystery surname list NASH-AUSTIN)
He may have been from Louisiana, Arkansas?
Possibly born late 1890's or early 1900's.
Possibly of Melungeon/RedBone ancestry.
Lived in many places, Omaha Nebraska, Idaho?
WA, Many cities in CA, Mexico, disappeared after 1951.
Anyone recognize the man in this photo?
Where did he come from? who were his people?