I have a question regarding the Japanese language. The question is on the use of the suffixes "den" and "ha" to differentiate versions of a root art such as Onoha Itto-ryu and Takedaden Onoha Itto-ryu. The confusion with me lies in when to use HA and when to use DEN and is there a difference in their meaning.

Thanks ahead of time for your help.

Jose Garrido