April,

Can only encourage you to continue to whittle away at this. Continue talking to your family about the movement of the family after the 1925. It's not easy to trace people after the 1930 census. A lot of the problem is that you have so little solid data. Have you seen this death record ? You didn't mention it in you post. The certificate doesn't have any new info to speak of but every little bit helps. Keep on keeping on.

Name: Luther Williams
Titles & Terms:
Event: Death
Event Date: 18 Jul 1925
Event Place: Ironton, Lawrence, Ohio
Residence:
Street Address: 967 S. 8th
Gender: Male
Death Age: 6m
Marital Status: Single
Race: colored
Occupation:
Birth Date: 02 Jan 1925
Birthplace: Ironton, Ohio
Estimated Birth Year: 1925
Burial Date: 20 Jul 1925
Burial Place:
Cemetery: Woodland
Father: Isaac Williams
Father's Titles & Terms:
Father's Birthplace: Alabama
Mother: Eul... Bellamy
Mother's Titles & Terms:
Mother's Birthplace: Alabama
Spouse:
Spouse's Titles & Terms:
Reference Number: fn 41038
Film Number: 1992675
Digital Folder Number: 4001618
Image Number: 2905
Source: Ohio, Deaths, 1908-1953. Familysearch.org