'BormParticipant' allButFirst: 4

('BormParticipant' splitOn: 'Borm') last

Thank you both, this will work. :)

In the Moose configuration, there is a CollectionExtensions that allows you to do this:
'BormParticipant' removePrefix: 'Borm' "-> 'Participant'".
'BormParticipant' removeSuffix: 'Participant' "-> 'Borm'"

For Pharo 5, we should move these extensions to Pharo.

Isn't it the case that a remove* methods mostly return what has been removed? Wouldn't be

withoutPrefix:
withoutSuffix:

I guess withoutPrefix: would probably makes more sense.

Thanks,

Peter