I am not sure if Clara and William also appear in the group photo. Clara has a slightly pointed chin so could possibly be either of the younger girls, but I am not convinced the mouth or face shape is the same.
The big photos are huge on my iPad so I can’t see the whole thing without scrolling so not easy to compare.
I agree that the group photo was taken in the 1930s and could be prior to 1936.
Regarding ages, here are my estimates, though I am not confident:
Young woman - 20s
Man - 50s
Woman - 40s
Gent - 40s - 50s
Young woman - 20s
Middle aged woman - 40s
Older seated woman - 60s but could be younger.
The two young girls look similar - possibly sisters of a similar age if that fits in with what you know about your family? The one on the right looks younger.
I think the middle aged gents might match up with the middle aged women. The one on the left has his hand on the shoulder of the woman in front of him. The middle aged gents look similar - possibly brothers. The one on the left looks older and may be going grey. I initially did not notice this but it sort of tallies with estimated ages and relationships. Maybe two groups of 3 family members on each side with grandma in the middle.
You might have three generations here - two middle aged couples, the matriarch, and two daughters of one of the couples, or one daughter from each couple.
Keep in mind that people had photos of people in their albums who were not relatives - friends, neighbours too, so if you can’t make them fit into your family ......
Added: photo of Clara looks to have been taken in the 1950s. She looks happy and dressed up so maybe taken at a wedding.
Photo of William is difficult to date, but I think possibly a bit earlier? 1930s or 40s?
Do you have any elderly relatives who may be able to identify these people?