Oscar Moreno Valdevieso
Mayor of Matalam (re-elected 2025)
In officeSources: Rappler · 2025 Matalam results; INQUIRER.net · Old political families dominate Cotabato's electoral landscape (Williamor Magbanua)
See Oscar Moreno Valdevieso in the map →Valdevieso (Matalam) family of Cotabato
Matalam's mayor and vice mayor are father and daughter.
2 documented relatives · 2 currently in public office · 1 documented relationship · Province of Cotabato
Who they are
Cheryl “Gigi” Valdevieso Catamco
Vice mayor of Matalam (elected 2025, 206-vote margin); former vice mayor
In officeSources: Rappler · 2025 Matalam results; INQUIRER.net · Old political families dominate Cotabato's electoral landscape (Williamor Magbanua)
See Cheryl “Gigi” Valdevieso Catamco in the map →How they are related
- Oscar Moreno Valdevieso and Cheryl “Gigi” Valdevieso Catamco — Father → daughterBloodEvidence: INQUIRER.net · Old political families dominate Cotabato's electoral landscape · “In Matalam, Mayor Oscar Valdevieso and his daughter former Vice Mayor Gigi Valdevieso-Catamco run in tandem against Vice Mayor Ralph Ryan Rafael and Councilor Mylene April Babol.”; PCIJ · Pacquiaos keep 5 seats in Soccsksargen; Mangudadatus win in Sultan Kudarat
How this was researched
Researched September 2026 against Comelec 2025 results. Every relationship is quoted from a published source; people who share a surname without a published statement of kinship are left out. Family relationships do not imply wrongdoing or political agreement.
Documented family networks; not a complete government or barangay roster. National offices are distinct from local offices.
Open the Valdevieso (Matalam) relationship map →Sources
- Rappler · 2025 Matalam results · 2025-05-13
- INQUIRER.net · Old political families dominate Cotabato's electoral landscape (Williamor Magbanua) · 2024-10-10
- INQUIRER.net · Old political families dominate Cotabato's electoral landscape · “In Matalam, Mayor Oscar Valdevieso and his daughter former Vice Mayor Gigi Valdevieso-Catamco run in tandem against Vice Mayor Ralph Ryan Rafael and Councilor Mylene April Babol.” · 2024-10-10
- PCIJ · Pacquiaos keep 5 seats in Soccsksargen; Mangudadatus win in Sultan Kudarat · 2025-05-22
Other families documented in Cotabato
- Taliño-Mendoza (Carmen / provincial capitol)Governor Lala Taliño-Mendoza heads a clan that holds the governorship, vice governorship, the 3rd district House seat and the Carmen mayoralty and vice mayoralty.
- Piñol (M'lang / Kidapawan / provincial)Former governor and Agriculture Secretary Manny Piñol, his brothers Efren, Socrates, Bernardo Jr. and Joselito, Bernardo's brother Gerry, and Manny's daughter Krista have held or sought provincial and town posts.
- Sacdalan (Alamada / Midsayap / 1st district)Alamada mayor and former governor Jesus Sacdalan, his sons Victor (Alamada vice mayor) and Joel (1st district representative 2019-2025), and his nephew Rolando (Midsayap mayor).
- Evangelista (Kidapawan)Former Kidapawan mayor Joseph Evangelista, now a 2nd district board member, was succeeded as mayor by his son Pao.
- Guzman (Kabacan)Kabacan's mayor and vice mayor are wife and husband.
- Mahimpit (President Roxas)Father and son swapped the President Roxas mayoralty and vice mayoralty in 2025.
- Gonzaga (Magpet)Son and father hold the Magpet mayoralty and vice mayoralty.
- Sultan (Pikit)Sumulong Sultan has led Pikit since 2006, swapping the mayor and vice mayor seats with his daughter Muhyryn, whose husband is vice mayor of Pigcawayan; her sister and a cousin sit on the council.