I’m trying to obtain any information on the person the Park ( Ecosystem, etc.), is named after. Could you please provide any biographical or historic links and data that is readily available ? Thank you very much !

Sorry, I have no information on the origin of the Leuser name. Maybe there are some others who can help?

Hi Moorem,
I don't know the answer of your question for sure, but below is a link where you can read more about Leuser and the tragedy that hit the area last year. I am sure someone in the orangutan organisation could help you with more information regarding Leuser Ecosytem.
http://www.orangutans-sos.org/flood.htm

Cheers,
expat