Recipe for Limoncello

My freezer is filled with fifths of Limoncello and "Orange-cello''. For those of you unfamiliar with limonello here's a brief description. Lemon liqueur of Italian origin. What it essentially is is vodka infused with lemon essence sweetened with simple syrup. I've been trying to find an Italian name for the same liqueur but where orange replaces the lemon. How to make it:
12 lemons, 2 - 750ml bottles of good 100 proof vodka, 1 cup sugar (granulated), 1 cup water. (Note: the water and sugar will be used as simple syrup and can be made ahead of time and stored as it will be introduced to the vodka after several days.) -- Remove zest only from lemons (no pith), place zest into one (1) of the bottles of vodka and store in cool, dry, dark place for 2 weeks. The oils will be leached out of the zest from the alcohol. After two weeks, remove the zests. I find that filtering the vodka through a coffee filter into a large bowl works best in removing most of the unwated particles from the liquid. Combine the "lemon vodka" with the second bottle and the simple syrup (1 cup water plus 1 cup sugar). Re-bottle the liqueur. Note also that you now have more liquid than bottles. Having extra empty vodka (clean) bottles on hand comes in handy. Liqueur must be given time to marry all the flavors and sugars. This is best done in the freezer for at least another week. This makes great holiday gifts (NOT FOR KIDS) or when visiting dinner parties with friends. The orange version of this liqueur is done the same way but with 4-6 oranges, not 12. I'll be trying it with limes as soon as I make room in the freezer. By the way, if anyone knows what the orange liqueur would or should be called, please let me know.