Actually the rules do say that you can have two one handed weapons, a one handed and a two handed weapon or a two handed weapon...so giving him four one handed weaps is outa the question...
as for giving him say two bolt pistols that is acceptable...as they count as CCW anyways you would still get the bonus attacks but would lose the armor save modifyers for having a PW in HtH...likewise you could give him the two power weaps but then there is the lack of ranged attacks so it's basically up to you
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I am Wolfpack, my fangs are long, my hair grey with age...I am The Great Wolf...I fight with bolter and Axe, my armies vast, my word final. A true son of Russ, my honor above all, I hunt the heretic, the xenos, and the witch and slay them where they stand! My sons hunt our enemies,
slay them where they falter and bring their pelts to Fenris