So are you considering
Enitan Hugo as a combo?
I do like the connected dots you have between
Hugo and Shug/Shuggie. I will say that I imagine most guys I know would not be happy if Shuggie stuck around in common usage into adulthood. I'd hesitate to plan on that, and actually consider it lasting as a possible bad side effect. I'd be concerned it would fade out and then you'd be back with their similar first names.
~Anna~