The 8th alphabetic character is the "H". Thus 88 stands for HH sometimes. Though I believe that is only common in german languaged countries due to the strong prosecution of Nazi content.
On Topic: Gul Dukat lend me his name. I needed a name for LAN games with my friends and though I'm far from being as evil as Gul Dukat is, the claim to be evil towards my ingame rivals was the inspiration for this. This really comes with a portion of primordial irony.
However, Gul Dukat was too obvious to be used online, some outdated figure, causing people to refer to DS9. I cut off the "Gul" until I realized that there are some more "Dukat's" out there playing almost the same games than I do. For proper recognition I added some weird tags that didn't really help giving a clear identity.
Some time ago I fell back to the simple name "Dukat" without any tags as even the name "Dukat" became less and less hip due to the age of DS9.
However, nowadays it gives me new headaches again. People in the former eastern bloc flow the internet and bring their own knowledge of the term "Dukat". In croatia there was a creamery named Dukat which's downfall was considered as a result of globalization and Hedge Fonds, if I remember correctly.
And even more there is a city in siberia called "Dukat" which causes more and more russians to come over to me ingame asking whether I'm russian, and when they find the answer they usually walk off without ever saying a word again.
http://www.flashearth.com/?lat=62.549744&lon=155.550009&z=12.7&r=0&src=msl