Historical records matching Martin Heidegger
About Martin Heidegger
Note that Hermann's natural father was not in fact Martin, but Dr Friedel Caesar. This is mentioned in various sources and revealed in Letters to My Wife.
This book describes the affair and cover-up: Stranger from Abroad: Hannah Arendt, Martin Heidegger, Friendship and Forgiveness, by Daniel Maier-Katkin, 2010 https://books.google.com.au/books?id=VkXeQCR38JUC&pg=PA40&lpg=PA40&dq=dr.+friedel+caesar&source=bl&ots=DlcNKVBcPP&sig=sYnNB-pQqxU62fFS10sxUhQa4Eg&hl=en&sa=X&ved=0ahUKEwj_w676-pDRAhWHW5QKHZg8DaEQ6AEIGTAA#v=onepage&q=dr.%20friedel%20caesar&f=false
Photograph of his house in Freiburg: http://virtualglobetrotting.com/map/martin-heideggers-house-former/view/google/
Evangelische Trauung am 25.03.1917 in Wiesbaden