Henry van Gruisen1
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Wilfred van Gruisen1

He fought in the First World War.1 He was awarded the Military Cross (M.C.)1
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Nicolas Laurentius Gruisen1 
He was founder of Van Gruisen & Son, piano-makers.1
Children of Nicolas Laurentius Gruisen and Anne Clegg Jenkinson
- Nicolas Laurentius van Gruisen+1 b. 1856, d. 1912
- Albert Henry van Gruisen+1 b. 1858, d. 1941
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Anne Clegg Jenkinson1 
Children of Anne Clegg Jenkinson and Nicolas Laurentius Gruisen
- Nicolas Laurentius van Gruisen+1 b. 1856, d. 1912
- Albert Henry van Gruisen+1 b. 1858, d. 1941
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Nicolas Laurentius van Gruisen1 
He was director of Van Gruisen & Son, piano-makers.1
Child of Nicolas Laurentius van Gruisen and Lucy Todd
- Nicolas Albert Roy van Gruisen1 b. 1889, d. 21 Aug 1918
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Lucy Todd1 
Child of Lucy Todd and Nicolas Laurentius van Gruisen
- Nicolas Albert Roy van Gruisen1 b. 1889, d. 21 Aug 1918
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Nicolas Albert Roy van Gruisen1

He was head of N.L. Van Gruisen & Son, pianoforte-makers.1 He fought in the First World War.1 He gained the rank of Captain in the 9th Battalion, King’s Liverpool Regiment.1
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Dr. Frederik Fentener von Vlissingen1 
Child of Dr. Frederik Fentener von Vlissingen and Sophia Schout Velthuys
- Wilhelmina Florentine Fentener von Vlissingen+1 b. 8 Aug 1909, d. 2 May 2003
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Sophia Schout Velthuys1 
Child of Sophia Schout Velthuys and Dr. Frederik Fentener von Vlissingen
- Wilhelmina Florentine Fentener von Vlissingen+1 b. 8 Aug 1909, d. 2 May 2003
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Sigmund Franz Pompejus Graf von Cassis-Faraone1 
Child of Sigmund Franz Pompejus Graf von Cassis-Faraone and Dora von Marckstadt
- Leo August Johannes Friedrich Wilhelm Graf von Cassis-Faraone+1 b. 29 Jul 1894, d. 1 Jul 1952
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
