Johannes Gijsbertus Koene1887–
- Name
- Johannes Gijsbertus Koene
| Birth | estimated as equal to wife's birth year about 1887 |
| Birth of a daughter #1 | Agathe Gerardina Koene September 3, 1912 (Age 25 years) |
| Death of a wife | Theodora Paulina Jacoba Masthoff March 30, 1944 (Age 57 years) |
| Death of a daughter | Agathe Gerardina Koene 1992 (Age 105 years) |
| Alfred W. Generation |
| Family with Theodora Paulina Jacoba Masthoff |
| himself |
Johannes Gijsbertus Koene Birth: estimated as equal to wife's birth year — about 1887 |
| wife |
Theodora Paulina Jacoba Masthoff Birth: June 21, 1878 91 41 — Rotterdam, Zuid-Holland, The Netherlands Death: March 30, 1944 — Semarang, Central Java, Netherlands East Indies |
| daughter |
Agathe Gerardina Koene Birth: September 3, 1912 25 34 — Pangkalanbrandan, Oost Sumatra, Netherlands East Indies Death: 1992 |