lself
For your convenience,
power:力(chikara,riki,ryoku),能力(nou-ryoku),権力(ken-ryoku)
tribe:部族(bu-zoku),一族(ichi-zoku),集団(shuu-dan),仲間(naka-ma)
correspondent kanji:力(riki/power),勁(kei/power),勢(sei/momentum),能(nou/ability)
族(zoku/tribe,family),団(dan/group),連(ren/federation),会(kai/party,meeting),党(tou/party)
"Derick" in Chinese language(not Japanese on-yomi)
德里克
derick in Chinese, derick translation by Nciku Chinese Dictionary
德里克·罗斯 - 维基百科，自由的百科全书
I dont recommend using kanji in tatoo.
It does not look cool from eyes of Japanese people.