Walter Doehner was a survivor of the Hindenburg disaster.
In the Timeless Universe
In the original timeline, Walter Doehner survived the Hindenburg disaster, but his father, Hermann Doehner, and his sister, Irene Doehner, did not.
In the altered timeline, Hermann and Irene survive. Irene goes on to marry Stratton Hicks. Walter becomes the uncle of their daughter, Sarah Hicks, and the great-uncle of Sarah Hicks' daughter, Elizabeth Merrick.
Walter Doehner on Find A Grave