This seems to be a word of Arabic origin that is used now in Swahili as a word (i.e. a loan word?) and also as a given name. The meaning is "knowledge, wisdom".
E.g. see here:
http://african.lss.wisc.edu/utamaduni/glossary.htm#maarifahttp://www.dustedmagazine.com/reviews/2255
Rene www.AboutNames.ch