Don't throw your weight around, please. I am not a single issue campaigner. I happen to be interested in 19th century church music as it happens. Do you not think that it would be kind to respect Mendelssohn senior's wishe on this matter? He wished to abandon Judaism. Should he not be allowed to do so? Felix Mendelssohn was very ostensibly a Christian composer who wrote a great deal of church music, much of which is used liturgically today. If he was a convert, like Mahler, then it might be reasonable to categorise him as Jewish, in that he would have been Jewish for part of his life. However, he was not. He was baptised as a Christian having been born to Christian parents. If you would like to categorise him as a Jew, would you allow me to categorise Mr Obama as a Muslim in that he has a Muslim name and had Muslim grandparents? If the matter is controversial, it should not be there. You are also WRONG about Grove.