Among the Nuba, regarding girls, if a daughter is born first she is called Kaka, the second-born is Toto, the third is named Koshe, the fourth is Kiki (or Ngori, or Kikingori), and the fifth-born (regardless of gender) is named Nalu (Seligman 1932: 386-387).
So, according to Seligman, the Nuba of Sudan name a fifth born boy or girl whose preceding siblings were all girls is named Nalu.
Reference: Seligman, C.G. and Brenda G. Seligman. Pagan Tribes of the Nilotic Sudan. London, England: George Routledge and Sons, 1932.