Birthes of after 1902 are not all public,so the birth of Antonia Maria Koreman can't be found. She is available in the bevolkingsregister (kind of census)of Den Helder. Go to
428 Den Helder 1917 1940 Gezins- en dienstbodenkaarten, letter K
Look there for page 4295 & 4296 with data about Theodor Franz Koreman, Jacomina Willemse born in Zierikzee and Antonia Maria Koreman.
The family moves on 04-08-1938 to Soerabaja in the Dutch East Indies.
Zierikzee data is available on http://www.zeeuwengezocht.nl/en/