Haim Katz - Hachoen Wartski Please hold any changes until the Kra/Caro issue for GENI is settled.
On the Kra/Caro distinction, like most Ashkenazi/Sephardic things, Jacobi has studied the issue and has written that the Ashkenazic family was written throughout history in Hebrew as: קרא or קארא and since these letters can be transcribed variously as Kara, Cara, Kra, (or even Cra, which I have never seen used). The Sephardic name was "invariably" written as קרוֹ or קארוֹ (hence Cro, Caro, Kro, Karo) (Jacobi Papers Vol3, Page 88, 16). All of the profiles we are looking at now pertain to the Ashkenazic family which I choose to call Kara because that is apparently the way it was written by the family for 400 years (in the 18th Century the vast majority of the Ashkenazic family went from Kara to Caro, due to a mistaken belief that they descended from the Sephardic Joseph Caro (Shulhan Aruch). The Sephardic family he names as Caro. Jacobi did not find any evidence of a family tree connection between the Ashkenazic Kara and the Sephardic Caro families
So to sum up the Jacobi analysis: the Ashkenazic family is best called Kara, and the Sephardic family is best called Caro, BUT in the 18th Century, the Ashkenazic Kara family began for the most part to use Caro due to a self-perpetuated genealogical error.
So as for which names to use on GENI, I suggest that we not try to standardize the spelling on GENI. Just as we now have Ashkenazic Spira, Spiro, Shapira, Shapiro, etc. Due to the nature of GENI, trying to maintain a specific spelling is going to create a never-ending monitoring task. The important thing on GENI is to keep the pedigrees and descents accurate, regardless of what spelling variants are used by the various managers and curators.
I have attached what Jacobi writes about the Ashkenazi Caro name to many of the relevant profiles (for example here: https://www.geni.com/documents/view?doc_id=6000000213347114841).