@Gernsheim This does not seem to be easy with marginpar. But your question doesn't provide enough information. Please tell us more: Why would you like to repeat a marginpar? Which documentclass do you use? And so on. You may edit your question.
– Keks DoseJul 26 '12 at 12:13
With no more information, I've closed this as 'too localized'. Request reopening if more information is edited in.
– Joseph WrightSep 01 '12 at 21:38
\marginpar? Or are you using themarginnotepackage? – Werner Jul 24 '12 at 23:52