What this does and doesn’t mean
Every move counted here is legal. The Local Government Code (and, for House members, the Constitution) limits an official to three consecutive terms in the same office; it does not stop them from running for another office, or for the same office after one term out.
The risk level measures how concentrated a seat has become in one person or one surname. It is not an accusation of wrongdoing.
“Same surname” means a shared last name, or a last name that matches the other’s middle name, as BetterGov.ph Dynasties defines it. A shared name may not mean the two are related.
Source: COMELEC results 2001–2025 compiled by Open Halalan (ODbL), via the BetterGov.ph Dynasties dataset. Covers governor, vice governor, district representative, mayor and vice mayor seats. Representatives fall under the Constitution’s three-term limit.