Thanh Đa is a “peninsula” in Bình Thạnh District (HCMC).
It was written in the old gazetteer of Gia Định Province (Saigon) that “Thạnh Đa Hamlet” means a place of prosperity (Thạnh – Thịnh: prosperity; Đa: a great deal of).
The name Thanh Đa came to life due to a printing error that produced Thanh Đa instead of Thạnh Đa.
*Source: varied