Need help with finding a Birth Church Record Please

[aileen young]

Would love some help in finding the birth church record of

William Christiansen  parents Father Christian Peter Frederik Christiansen , Mother Rosa Frederikke Sigrid Onsberg married 4 February 1912 Frederiksberg Kobenhavn.

Found date of Williams birth 3 October 1908 Kobenhavn on his Civil Marriage Kobenhavn Folio 607 married date 10 February 1932 to Elma Egidie Pedersen.

Have looked in Churches.
Frederiksberg Kobenhavn Ops 89-106
Hilling Kors Ops 185-192
Trinitatis Ops30-40.
Vor Frue Ops 80-90
Vor Frelser Ops 15-21
KommuneHospital Ops 38-44

Have found other children's records.
Oda Kristine  May 23 1910 in Helling-Kors
Lilli Valborg May 17 1912 in Nykobing, Maribo
Borge Johannes April 24 1915 census 1925 Kobenhavn haven't found his church record.
Emma Alice March 12 1917 in Simeons
Erik Harold January 29 1919 in Simeons
Knud Frederik July 21 1921 in Simeons
Leif Fine January 22 1922/1927 in 1930 Census Kobenhavn unable to read where born.
Arn Onsberg November 6 1929 Grundvigs-Bispebjerg

Any help would be welcome.

Aileen Young

[Inger Toudal]

William was born at Den Kongelige Fødselsstiftelse and baptized there 7 Oct. 1908: https://en.wikipedia.org/wiki/F%C3%B8dselsstiftelsen

https://www.sa.dk/ao-soegesider/da/billedviser?epid=17114465#148988,24627806 - No 629

According to the record, C.P.F. Christiansen, who submitted a written statement 9 Nov. 1924 giving his consent to changing Williams's surname,
was his stepfather:

Lov No 130 af 27/5 08 § 11: http://www.salldata.dk/love/love/1908-05-27.pdf - § 11

Venlig hiisen
Inger Toudal

[aileen young]

Inger ,Once again thank you so much ,

Would never have found the record nor would have known about the surname change, interesting to read about the hospital.

Aileen