Is it permissible to write the word "أوروبا" (Europe) as "أوربا", or "أوروبة", or "أوربة"?

No etymological root for this word has been found, nor has its spelling been detailed from a reliable source. Its spelling has appeared in contemporary history and literature books in four different ways. Dr. Mus'ad Ziyad mentioned that it is a foreign word and should be written with a long alif.

According to the orthography dictionary, the soft alif at the end of foreign nouns is written as an alif, such as "Yafa" and "Canada."