Diederick \di(e)-deri-ck, died(e)-rick\ as a boy's name is a variant of Dedrick (Danish, Old German) and Dietrich (German), and the meaning of Diederick is "power of the tribe".
The baby name Diederick sounds like Diedrick, Dedric, Tedrick and Thedrick. Other similar baby names are Dierick, Sedrick, Cedrick, Delrick, Derrick, Derick, Dieric, Dierck, Ederick, Federico, Goderick, Jedrick, Kedrick, Keddrick, Roderick and Rodderick.