Rawya or Rawiya is a female Arabic name meaning "storyteller" (derived from the Arabic word rawa, meaning "to relate") (BehindTheName). Her name may be a reference to Rawya Ateya (Egyptian, 1926-1997), who in 1957 became the first woman in the Arab world to become a member of parliament (Wikipedia).
Her surname may derive from Saad Zaghloul (1859-1927), who was an Egyptian revolutionary, statesman and the Prime Minister of Egypt in 1924 (Wikipedia).
Lexicon list of Seekers
From the Web
Writing by J.K. Rowling on Pottermore:
Pottermore enhanced reading experience: Quidditch World Cup
Screenshots of the original Daily Prophet coverage of the 2014 Quidditch World Cup on Pottermore: Imgur archive
Harry Potter Wiki: Rawya Zaghloul