From some of the names I have characters, so I hope this will make it more easy to know what the characters of the others could have been:
余 family
5. Oldest generation, around 1850 Oe Tjoe Tin, possibly Oe Tjoe Kay
4. Next generation around 1880 Oe Eng An, Oe Eng Lo
3. Next generation Around 1900 Oe Oen Djiang (余允讓 ), Oe Oen Seng, Oe Oen Ho
2. Next generation Around 1930 Oe Po Liem (余寶粦 ), Oe Po Ham, Oe Po Giok (余寶玉)
曾 family
Around 1850 Tjan Lian Tjioe
Around 1880 Tjan Djie Siong ( probably曾如松) Tjan Djie Peek ( for sure 曾如柏)
Most important to know is:
Oe Eng An
Oe Tjoe Tin
Oe Po Ham
Tjan Lian Tjioe
It would be great if somebody could help me to find the correct characters!
Just to be sure I added the names with characters as an image.
