Gerda Emilie Engebretsdatter Kihleie

Hello, According to one of my family members, Gerda Emilie Engebretsdatter died very young, but can't tell me why. It sounds kinda mysterious and like a family secret. This is what I know: Gerda Emilie Engebretsdatter Birth: 26 May 1894 Norderhov, Buskerud, Norway Baptism: 12 Aug 1894 Norderhov, Buskerud, Norway Father: Engebret Evensen Hagastuen Marigaardseie Mother: Gunda Haraldsdatter Jordestuen 1894 Birth and Baptism: https://www.digitalarkivet.no/en/view/255/pd00000032154910 1900 Census: https://www.digitalarkivet.no/en/census/person/pf01037110004167 Engebret dies in 1909 and so Gerda is gone in the 1910 Census 1910 Census: https://www.digitalarkivet.no/en/census/person/pf01036462005957 I believe to have found her here: 1910 Census: https://www.digitalarkivet.no/en/census/person/pf01036462003579 Supposedly she gave birth to Gunnar Roa, of whom I cannot find a birth entry. According to his Gravestone b. 23 OCT 1918 d. 27 JUL 2001. I believe to have found him here, as Gunnar Syversen Roa: 1920 Census: https://www.digitalarkivet.no/en/census/person/pf01073776005982 Gerda Emilie's Brother Harald Engebretsen's Death Notice mentions a Sigurd Syversen, which is also mentioned in the 1920 census. He is mentioned on Harald's death notice on 25 OCT 1918, 2 days after Gunnar's birth but Gerda is not. So A) what a random coincidence that Harald died two days after Gunnar's birth? B) That Gerda appears to have died and C) that I cannot find Gunnar's birth or baptism entry. 1918 Harald Engebretsen Death notice: https://www.nb.no/items/deef93d7f138e4dc5ae8ff35742b4b5f?page=1&searchText=%22Harald%22