What would be a good nickname for sarah? (not sally or sadie)?

My sister's name is Sarah with a J middle initial too. A lot of family calls her SJ or Sar but I've called her Saje (SAH- zhee) (hard to spell that last noise) for a long time. Her friend from South Africa told her it was her name in another language. I don't know if I believe it but it stuck and it's a fun, unique nickname.