Phú Nhuận's name has stayed put for over three centuries, even as the borders, the rulers and the very idea of the city around it changed almost beyond recognition.
Thôn Phú Nhuận appears in scholar Trịnh Hoài Đức's Gia Định Thành Thông Chí as a village of Bình Trị canton, Bình Dương district, Tân Bình prefecture, Phiên An garrison. Its settlers were largely soldiers stationed at Phiên An and migrants from Đàng Ngoài, the Trịnh-controlled north.
"Phú Nhuận" is drawn from a classical Chinese phrase, phú nhuận ốc, đức nhuận thân — roughly, "wealth adorns the house, virtue adorns the person" — an aspirational name chosen by settlers for a patch of dry, unpromising high ground rather than a description of what the land already offered.
After Nguyễn Ánh recaptured Huế and reorganized the south, Gia Định briefly becomes a trấn (garrison region), and its capital — Gia Định Thành — is seated in this immediate area, making Phú Nhuận, however briefly, close to the administrative heart of the entire south.
The hamlet around Cầu Kiệu bridge becomes Phú Nhuận's first real population cluster, later expanding as settlers from the Mekong Delta provinces and Chinese traders arrive to farm vegetables and tobacco.
The Indochina governor-general's office separates parts of Gia Định province, including Phú Nhuận village, into the short-lived Tân Bình province — dissolved again the following year.
Phú Nhuận commune becomes the administrative seat of the newly created Tân Bình district, a role it holds until 1975 — the small commune effectively governing the much larger district built up around it.
Phú Nhuận is formally established as its own district of Ho Chi Minh City, ending its long run as an administrative appendage of somewhere else.
A citywide ward reform redraws Phú Nhuận's internal boundaries, folding several old numbered wards — including those built from the historic Cầu Kiệu hamlets — into new named wards.