P. Paul Ewald

Peter Paul Ewald (1888 - 1985)

Privacy Level: Public (Green)
Peter Paul (P. Paul) Ewald
Born in Berlin?, Germanymap
Ancestors ancestors
[sibling(s) unknown]
Husband of — married [location unknown]
Descendants descendants
Father of [private son (1910s - 1990s)], [private daughter (1910s - unknown)], [private daughter (1910s - unknown)] and [private son (1920s - unknown)]
Died in Ithaca, NYmap
Profile last modified | Created 3 Nov 2014
This page has been accessed 386 times.


from his GENI profile

He was always known as Paul and his first great-grandchild Paul Munson Bethe was named for him.

See wikipedia[1] for information about his career as a physicist. He "was a German-born U.S. crystallographer and physicist, a pioneer of X-ray diffraction methods."

In his later years, when he retired, he lived in Ithaca, NY within a short walk from his daughter Rose Ewald Bethe. He drew up the family tree of Ewalds and Phillippsons, which is replicated here, for his grandchildren. His wife was a distant cousin of his. His more famous son-in-law was briefly a student of his back in Germany when daughter Rose was 12.

He enjoyed long walks (short hikes) on nature trails of which there are many in Ithaca. He had a delightful sense of humor and was much loved by his family.

Here is an excerpt from a biographical account of Ludwig Hopf [2] "Hopf and fellow Sommerfeld student Paul Peter Ewald (who, like Hopf, called one of his sons ‘Arnold’ in later years) presented an artistic version of the theory, with Hopf (of small stature and rather portly) as the stationary electron and Ewald (long and thin) as the moving electron – and the sketch was delivered, as Sommerfeld recalls in his obituary of Hopf, in excellent verses. Peter Debye, a talented Dutch physicist who had already been Sommerfeld’s assistant in Aachen and moved with him to Munich, recalled that Ewald, Hopf and himself were prime movers in setting up the famous ‘Sommerfeld seminars’ – crucially excluding Sommerfeld so that “stupid” questions by younger students could be aired."


  1. http://en.wikipedia.org/wiki/Paul_Peter_Ewald
  2. https://ulir.ul.ie/bitstream/handle/10344/4716/Holfter_2015_Hopf.pdf?sequence=2
  • Source: S109 Title: as told by Rose Ewald Bethe
  • Source: S297 Title: Ancestry Family Trees Publication: Name: Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members.; Repository: #R2
  • Repository: R2 Name: Ancestry.com Address: E-Mail Address: Phone Number:
  • Source: S300 Author: Ancestry.com Title: U.S., Social Security Death Index, 1935-Current Publication: Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2011; Repository: #R2
  • Source: S301 Author: Ancestry.com Title: New York, Passenger Lists, 1820-1957 Publication: Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2010; Repository: #R2

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No known carriers of P. Paul's Y-chromosome or his mother's mitochondrial DNA have taken yDNA or mtDNA tests and no close relatives have taken a 23andMe, AncestryDNA, or Family Tree DNA "Family Finder" test.

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Images: 2
Wedding party at Henry Bethe and Kitty Munson's wedding
Wedding party at Henry Bethe and Kitty Munson's wedding

Paul with his great-grandson and namesake
Paul with his great-grandson and namesake


P. Paul is 37 degrees from Rosa Parks, 32 degrees from Anne Tichborne and 20 degrees from Victoria of the United Kingdom of Great Britain and Ireland on our single family tree. Login to find your connection.

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