Thanks for your posting and using Aspose.Cells.
You can create a non-contiguous range with the following code. However, you will have to convert your R1C1 cell references into A1 cell references. You can use CellsHelper.celllIndexToName() method for this purpose.
Workbook workbook = new Workbook();
int nameIdx = workbook.getWorksheets().getNames().add(“TestRange”);
Name name = workbook.getWorksheets().getNames().get(nameIdx);
//Create non-contigous range