I don't know if I ever responded to your query so will do so now just in case. Hope you see it.
I don't have a record of a child of Della and Joseph Napoleon that died at age 4, but I do have another child that you are missing who was born on the date you have listed for that child. She is my husband's grandmother. Clara (Elsie) Marie Odellia Bidigare b. May 14th 1892 in Detroit. She died in 1977.
Glad to share information if you are still searching.
email me at firstname.lastname@example.org