Jacobus Martinus Laroo was born 26 October 1906 in Amsterdam, North Holland, Netherlands to Cornelis Gerardus Laroo (1871-1946) and Hendrika Magdalena Swagerman (1881-1968) and died 3 November 1978 Amsterdam, North Holland, Netherlands of unspecified causes. He married Unknown Roelofs (-) .
Children
| Name | Birth | Death | Joined with |
| Saskia Magdalena Johanna Laroo (1959) | |||
| Julia Margot Laroo (1961) | |||
| Charlotte Martine Laroo (1963) | |||
| Eva Maria Laroo (1964) | |||
Siblings
| Name | Birth | Death | Joined with |
| Jacobus Martinus Laroo (1906-1978) | 26 October 1906 Amsterdam, North Holland, Netherlands | 3 November 1978 Amsterdam, North Holland, Netherlands | Unknown Roelofs (-) |
| Alida Elisabeth Laroo (1908-1910) | 1908 Amsterdam, North Holland, Netherlands | 16 July 1910 Amsterdam, North Holland, Netherlands | |