var Clients = {
    client1 : {
        id : 1
        info : {
          dob : '1/1/70',
          name : 'boda'
        },
        ...
    },
    client2 : {
        id : 2
        info : {
          dob : '2/2/70',
          name : 'cydo'
        },
        ...
    },
    etc.
}

var client1_info = Clients['client1'].info;
delete Clients['client1'];

console.log(client1_info.dob)