Rachel van Collem was a daughter of Samuel van Collem and Grietje Moffie. She married in Amsterdam on 5 Junue 1933 to Arnold van Loggem, a son of Hartog van Loggem and Schoontje Rood.
City Archive of Amsterdam, archive card of Samuel van Collem and Arnold van Loggem.
In addition, a Jokos file (number 40491) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.