No, there is only one Holocaust. There are many persecutions going on, but calling them Holocaust denigrates the name Holocaust. Holocaust is not a name to be used loosely, it refers to that specific wipeout of Jews.
You should visit your local family court and request a change of name. Explain that you want to add a middle name for your daughter. The court may allow it and her legal name would be changed to the version with the middle name.
You can change your name to whatever you want when you get married, and you can also legally change your name while married and you will still be legally married unless you file and complete the divorce process.
The holocaust spanned over a much shorter period than the middle passage and the lives lost during the holocaust are a mere fraction to the untold amount of African lives that were lost during The Trans Atlantic Slave Trade.