Did you copy them in code or manually?
If you did it manually, you can rename the copy of the group by selecting it and
typing the new name in the name box.
If you did it in code, you can use something like:
Option Explicit
Sub testme()
Dim myLine1 As Shape
Dim myLine2 As Shape
Dim myLine3 As Shape
Dim myGroup As Shape
Dim myNewShape As Shape
With ActiveSheet
Set myLine1 = .Shapes.AddLine(271.5, 127.5, 318.75, 186#)
Set myLine2 = .Shapes.AddLine(240.75, 135#, 336.75, 180#)
Set myLine3 = .Shapes.AddLine(231#, 156#, 372.75, 169.5)
Set myGroup = .Shapes.Range(Array(myLine1.Name, _
myLine2.Name, myLine3.Name)).Group
myGroup.Name = "maxi"
Set myNewShape = myGroup.Duplicate
With .Range("a1:c9")
myNewShape.Top = .Top
myNewShape.Left = .Left
myNewShape.Width = .Width
myNewShape.Height = .Height
End With
myNewShape.Name = "maxi2"
End With
End Sub
You can also get the last shape you added with something like:
Option Explicit
Sub testme()
Dim myLine1 As Shape
Dim myLine2 As Shape
Dim myLine3 As Shape
Dim myGroup As Shape
Dim myNewShape As Shape
With ActiveSheet
Set myLine1 = .Shapes.AddLine(271.5, 127.5, 318.75, 186#)
Set myLine2 = .Shapes.AddLine(240.75, 135#, 336.75, 180#)
Set myLine3 = .Shapes.AddLine(231#, 156#, 372.75, 169.5)
Set myGroup = .Shapes.Range(Array(myLine1.Name, _
myLine2.Name, myLine3.Name)).Group
myGroup.Name = "maxi"
myGroup.Copy
.Range("a1:c9").Select
.Paste
Set myNewShape = .Shapes(.Shapes.Count)
myNewShape.Name = "Maxi2"
End With
End Sub
activesheet.shapes.count will be the last shape you added.