They had the following children:

• Leendert Neideck (? - 1972) [5]

Notes:

• Pieter's employment: clergyman of the Reformed Lutheran-Evangelical church, last position was in Amsterdam (which is the headquarters of the church).
• Pieter Neideck's family card from his childhood:
• Maria Elisabeth was the Director of the Lutheran Conference-centre in Amsterdam. [4]
• Witnesses at Pieter's birth: François Abraham Simon Thomas, 32 years old, verloskundige, living in Rotterdam & Dirk Philippus Bunt, 52 years old, commies, living in Rotterdam & Gerardus Lureman, 37 years old, klerk, living in Rotterdam
• Witnesses at the wedding: Johan Coert Schmidt, kantoorbediende, 57 years old, living in Rotterdam, uncle of the groom & Jacob Rijks, fabrikant, 52 years old, living in Rotterdam & Everard Hoedemaeker, koopman, 31 years old, living in De Rijp & Alexander Leendert van Blommestein, unemployed, 27 years old, living in Leiden

Sources:

1. "Netherlands, Zuid-Holland Province, Civil Registration, 1679-1942," database with images, FamilySearch (https://familysearch.org/pal:/MM9.3.1/TH-1-10796-3082-39?cc=1576401 : 8 July 2014), Rotterdam > Geboorten 1884-1886 v/a 12 mei > image 1515 of 1677; Nationaal Archief, Den Haag (National Archives, The Hague).
2. https://www.regionaalarchiefalkmaar.nl/collecties/genealogie/bronnen/weergave/register/layout/blader/id/1533dce7-d835-4ac0-97b4-aaee8ba214b2?image=3e9de48a-b4f8-d677-f96e-1bf404daa192
3. "DS. NEIDECK OVERLEDEN.". "Leidsch dagblad". Leiden, 31-03-1942. Geraadpleegd op Delpher op 15-08-2016, http://resolver.kb.nl/resolve?urn=ddd:010905492:mpeg21:a0017
4. "Luthersch conferentieoord". "Algemeen Handelsblad". Amsterdam, 02-09-1946. Geraadpleegd op Delpher op 15-08-2016, http://resolver.kb.nl/resolve?urn=KBNRC01:000046073:mpeg21:a0055
5. Familie Schmidt Stamboom, https://www.genealogieonline.nl/familie-schmidt-stamboom/I827.php