Saturnina Rizal Mercado de Hidalgo (1850 – 1913; née Rizal Mercado y Alonso Realonda), or simply Saturnina Hidalgo, was the eldest sister of Philippine national hero José Rizal. She was married to Manuel T. Hidalgo, a native and one of the richest persons in Tanauan, Batangas. She was known as Neneng.
As someone from Spain I'd like to say that this name has the connotations of being really old fashioned. Like a name someone's great grandma living in a remote village would have. If you take the connotations away it sounds nice, but again, everyone here would give weird looks about naming a baby this.