No, you cannot. A will only has power over effect over the specific assets, funds, or properties bequethed by it: it has no effect over anything not named in it. Furthermore, being named in a will only gives you a right to inherit those specific things left you--you have no rights over anything else owned by the deceased, so even this other property is mentioned in the will, if it not left to you by the will, you have no right to it. And being a godchild does not give you any inheritance rights over anything not specifically willed to you (unlike being a biological or adopted child, which does give you inheritance rights).