So you want to know which family members may be eligible?
yes I know about wives but what about the kids or grandkids?
Is the person a stepchild, grandchild, step grandchild, or adopted child?
no I don't think so
They are not eligible for survivors benefits
can someone get retirement and survivors benefits at the same time?
They can apply for retirement or survivors benefits now and switch to the other higher benefit at a later date
when can a widow get her own benefits that she earned through work?
They can switch to their own retirement benefit as early as age 62. This assumes you are eligible for retirement benefits and your retirement rate is higher than your rate as a widow
can the widow get monthly benefits if she is caring for the dead guy's daughter?