Haven't dared to try to see if works on both uppercase and lowercase initial y...
Gungnir Multibit is automatically transformed to gungnir multibit complete with capitalization
All of them have been added to the filter (if spelled correctly): M1mby, B1mby, Gumbby and Yiiggy
Yggdrasil (edit: hey, it works)
Yggdrasil Gungnir Multibit Bifrost Multibit Modi Multibit
Separate names with a comma.