| Birth | January 26, 1930 30 |
| Birth of a sister | Angela Grevenstette November 1, 1931 (Age 21 months) |
| Birth of a sister | Anna “Anni” Grevenstette March 6, 1934 (Age 4 years) |
| Death of a mother | Emma Moormann August 10, 1941 (Age 11 years) |
| Death of a maternal grandfather | Heinrich Moormann January 26, 1953 (Age 23 years) |
| Death of a maternal grandmother | Wilhelmine Bünnemeyer November 11, 1964 (Age 34 years) |
| Death of a father | Heinrich Grevenstette August 20, 1979 (Age 49 years) |
| Death of a husband | Bernhard Willenborg November 25, 1995 (Age 65 years) |
| Residence | |
| Death | January 13, 2007 (Age 76 years) |
| Family with parents |
| father |
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| mother |
Emma Moormann Birth: Death: August 10, 1941 |
| herself |
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21 months younger sister |
Angela Grevenstette Birth: November 1, 1931 32 Death: June 27, 2015 |
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2 years younger sister |
Anna “Anni” Grevenstette Birth: March 6, 1934 34 Death: August 8, 2011 |
| sister |
Private |
| sister |
Private |
| Family with Bernhard Willenborg |
| husband |
Bernhard Willenborg Birth: February 2, 1923 Death: November 25, 1995 |
| herself |
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| Media object | I2693 Clara Grevenstette-1.jpg Format: image/jpeg Image dimensions: 611 × 812 pixels File size: 72 KB Type: Photo Highlighted image: yes |
| Media object | I2693 Clara Grevenstette-2.jpg Format: image/jpeg Image dimensions: 452 × 601 pixels File size: 64 KB Type: Photo |