This is a new Project, although your surname is not listed, it can be. The only Surnames listed so far are those that tie to my own line either directly or collaterally, this will expand as others join the project. A data base has to start somewhere , this is the start. In answer to your 2nd question, for YDNA testing, you will need a male in your family who carries the name Isenberg, for the mtDNA testing you will need a female whose line goes daughter to mother to mother back to Lippe. I am not an expert on either DNA or Genealogy, however I do have over 40 years of research in genealogy, much of it done researching Lippe families. As stated in the project profile names in Germany change with Real Estate transfers, I have 3 direct line name change myself, and many more through collateral families. For those who want it I will lend my help to them. This will be a mutual data base that we will all contribute to.
I hope this answers your questions. If you would like to join let me know.