How can I reference recordset names in the output section of my cloudformation script?

I am creating some DNS entries in my cloudformation. There is a param passed into the cfn script, which results in the creation of a Route53 entry like hostname-test.example.com:

"Host" : {
  "Type" : "AWS::Route53::RecordSetGroup",
  "Properties" : {
      "HostedZoneName" : "example.com.",
      "RecordSets" : [
        {
          "Name" : { 
            "Fn::Join" : [ "-", [
                {"Ref" : "Hostname" },
                "test.example.com"
            ]]
          },
          "Type" : "A",
          "AliasTarget" : {
            "DNSName" : { "Fn::GetAtt" : [ "PublicWebLoadBalancer", "CanonicalHostedZoneName" ] },
            "HostedZoneId" : { "Fn::GetAtt" : [ "PublicWebLoadBalancer", "CanonicalHostedZoneNameID" ] }
          }
        }
      ]
  }
}

In my output, I would like to get the Name attribute from the RecordSet, but I don't know how to reference it. According to the Fn::GetAtt documentation, Route53 objects are not supported.

Is this possible?