They had 3 other children, may have died young? Didn't find more on Lewis J.
New Jersey, Births and Christenings, 1660-1980
Citing this Record: "New Jersey, Births and Christenings, 1660-1980," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FCKR-QYL
Name: Evelyn Brown Female
Birth: 22 Nov 1894 Birthplace: Paterson, Passaic, New Jersey
Father: Lewis J. Brown Mother: Mary Singleton
Reference ID: v 48
Citing this Record: "New Jersey, Births and Christenings, 1660-1980," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FCRZ-XZB
Name: William Brown : Male
Birth: 05 Feb 1890 Paterson, Passaic, New Jersey
Father: Lewis J. Brown Birthplace: U.S. Age: 29y
Mother: Mary Singleton Birthplace: U.S. Age: 23y
Reference ID: v 36 p 151
Citing this Record: "New Jersey, Births and Christenings, 1660-1980," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FCRN-K8F
Name: Ellis Brown Male
Birth: 12 Mar 1887 Paterson, Passaic Co , New Jersey
Father: Louis Brown Birthplace: US Age 24
Mother: Mary Singleton Birthplace: US Age 22
Reference ID: v 27 p 142
New Jersey Deaths and Burials, 1720-1988
Citing this Record: "New Jersey Deaths and Burials, 1720-1988," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FZZC-TBS
Name: Ellis Brown
Death: 15 Mar 1888 Paterson, Passaic, New Jersey
Age: 0 Birth Date: 1888 U.S.
Father Birthplace: U.S. Mother Birthplace: U.S.
Reference ID: v 23 p 371