Maria von Wedemeyer Weller (23 April 1924 – 16 November 1977) was an American computer scientist, who emigrated from Germany to the US after the Second World War.

He and von Wedemeyer corresponded during his imprisonment in Tegel Prison and she was permitted to visit him "fairly regularly, at least once a month".

[3] After he was implicated by association with the Abwehr members who planned the 20 July 1944 plot to assassinate Hitler, Bonhoeffer was transferred to the Gestapo high security prison at Prinz-Albrecht-Strasse and was permitted no further contact with her or his family.

During this time, she initially was employed as a statistician, but soon moved on to writing code (in machine language) at the pioneering computer company, Remington Rand UNIVAC.

Following this divorce, she returned to the computer industry, joining Honeywell Information Systems, which was based near Boston, and advanced from being a technical employee to a series of management positions.

[5] In 1966, she donated the Bonhoeffer letters and manuscripts that she possessed (including Faithfully and Quietly Surrounded by Good Powers, Jonah, The Death of Moses and The Past) to the Houghton Library of Harvard University, with access to them restricted until 2002.

[1] Her ashes are buried at the von Wedemeyer family gravesite in Gernsbach, Germany, where a memorial tablet to her, created by Andreas Helmling, was placed in the cemetery chapel in September 2009.