Complex sentence: Ibn Tawus was born on 15 Muharram 589/21 Jan.1193 in Hilla and was named Tawus (i.e. Peacock) because one of his forefathers was a handsome man with ugly legs so his progeny too inherited the title from him.
Split into simpler sentences: Ibn Tawus was born on 15 Muharram 589 (21 January 1193) in Hilla and was named Tawus (i.e. Peacock). One of his forefathers was a handsome man with ugly legs so his progeny too inherited the title from him.