[Although I'm afraid I can't tell you very much about Evelyn, I found out quite a lot about her family!
The story starts in 1878, when a 16 year old Jewish boy, Albert Titlebaum, arrived in Boston, MA, from Russia with his sister (and presumably their parents). He became a naturalised American in 1885, and in 1893 married another Russian Jewish emigree, Fannie, (formerly Miss Touvim or Touwim). He then set up, with J. Charles Touwim and Louis Smolensky, a clothing store, which obviously prospered.
During this time, which Wikipedia describes as "an era of religious separatism and anti-Semitism", Albert and Fannie were prominent among Boston's Jewish community that founded Beth Israel Hospital, specifically aimed at immigrants who only spoke Yiddish and kept a kosher diet. That hospital is now part of Beth Israel Deaconess Medical Center (BIDMC), the official hospital of the Red Sox.
Albert was also first president of the Hebrew Ladies Home for the Aged, which started in 1903 with 17 inmates which by 1927 had grown to 180; he was a President and/or Director of the Corporation Tifereth Israel, the Hebrew Free Loan Association, and the Bnoth Israel Sheltering Home.
Albert and Fannie Titlebaum had three daughters; Harriett (b. 1895, who later m. Max Ulim or Wlim), Esther (b. 1897) and Miriam Ruth (b. 1900, who later m. Harold Burroughs).
Their middle daughter, Esther, then became pregnant at the age of 16. She rapidly married (we presume) the father, Henry George Eisenstaht, on 11 February 1914, and our Evelyn was born just over 3 months later. Her recorded name was Evelyn Gertrude Eisenstaht.
Her mother Esther moved to New York to study medicine at Tufts University and became Dr. Esther Tuttle - it looks like this was an anglicization of her surname, not a marriage. She married Nathaniel Charles Greene (born in England to Russian parents) in 1928 and they had a son James Robert in 1930.
Meanwhile, in 1930, 15-year-old Evelyn was still living with her grandparents and her aunt Miriam, and specified her grandfather (whom she called Albert Tuttle on her ATA application form) as her father. She also started to call herself "Evelyn Constance Tuttle." ]
Evelyn went to Vanderbilt University, Nashville TN and then Columbia University, NYC
She married, on the 12 Feb 1935 in New York, Frederick Benjamin 'Fred' Hyam (sometimes spelt Higham), a British accountant b. 1908 in Bombay, India, "connected with a coal and cement firm" [Later a Captain in the Royal Artillery]
Fred and Evelyn sailed to the UK straight after the marriage and settled in London.
Her mother Esther became quite a well-known physician in New York, and lived at 1111 Park Ave (near Central Park), NYC.
Evelyn sailed back to the US on 4 Nov 1939 to stay with Esther - and to take flying lessons, it seems, because 2 years later she said her flying experience was "51hrs on Cubs, 60 and 65, and Fairchild KR17".
Evelyn then sailed back from Canada to the UK with Helen Harrrison, arriving 25 May 1942, giving her address as 6, Pall Mall, London SW1 and her next of kin as her husband Fred. [As Helen Harrison was recruited by Jackie Cochran, I have therefore assumed that Evelyn was too. But it may have been a coincidence...]
[Contract Terminated by ATA 30 Sep 1942 - Unlikely to become an efficient ferry pilot]
Subsequently offered a job as an ATA Operations Officer, commencing 10 October 1942, at £225 per annum, payable monthly... but for some unknown reason she left after 4 months.
Her grandfather Albert Titlebaum and her stepfather Nathaniel Greene both died in 1946.
Evelyn flew BOAC to New York to visit her mother in November 1948, just at the time when Esther was being indicted for defrauding the US Government of $19,606.66 in unpaid taxes for the years 1942-44. Esther denied the charge, and it looks as though she made an arrangement with the IRS as the case doesn't seem to have ever come to court.
In 1961, Esther was present when her son, James Robert Greene, married Janet Jordan, and here they are at the Belle Meade Mansion and Country Club in Nashville, TN:
Esther, Jim and Janet
Esther died in 1969.
Evelyn d. 19 Jul 1971 - Brighton
Download ATA Pilot Personal Record (.zip file):