I am expecting DC4. dc 1 is Joseph and will be 11 when baby arrives. He would be quite chuffed at the moment I know but whether that would wear off as he got older I don't know. I love both names and in my head they are totally different . NN for Josephine would be Posy so actually day to day would not be the same name. Could this ever be ok. Do you know any siblings with similar names.