Date/place of birth in New York, U.S., State and Federal Naturalization Records, 1794-1943 (Ancestry.com)
Identified as son of Martin Wahle and Johanna/Hannchen Kaufmann in Ansbach, Germany, Lutheran Parish Register Extracts, 1526-1940
In 1936, Ludwig Wahle left Germany, sailing from Hamburg to New York City, arriving 20 August 1936 in New York City; vor November 1938 Flucht aus Deutschland)
On 10 March 1940, Ilse Frank married Ludwig Wahle in New York City; see New York, New York, U.S., Marriage License Indexes, 1907-2018
Identified as father of Michael Wahle in 1950 USA Census.
Date/place of death in U.S., Social Security Death Index, 1935-2014 (Ancestry.com)