From the Yale 1926 Freshman Yearbook:

GRIFFITH MARK was born in Chicago, January 23, 1904, the son of Clayton and Anna (Griffith) Mark. His father is president of Clayton Mark & Company, steel manufacturers. His mother died on October 8, 1915. Mark has three brothers, one of them being Cyrus W. Mark, ex-'25. He also has five sisters, one of whom married Avery Rockefeller of our Class. He was prepared for college at the Lake Forest Academy and the Lake Placid School. He heeled the Record in Freshman year. He was a member of the Berkeley Association, the University Club, Delta Kappa Epsilon, and the Elihu Club. Mark remained with our Class until the end of Junior year. He roomed with Ehret all three years, McLaughlin rooming with them in Junior year. He is at present traveling abroad. His permanent address is Lake Forest, Illinois.

Griffith Mark was a son of Clayton L. Mark and Anna Lareau Griffith. He was born in Chicago, Illinois. 

He married three times: 
1) Elinor Patterson, who he married in 1929. 
2) Janet Moffett, whom he married Jan 26, 1942, in Annapolis, MD. They had three children together. 
3) Dorothy Harry, whom he married May 29,1959, in Lincoln County, Idaho. 

See also: https://www.geni.com/people/Griffith-Mark/6000000047717779135