Origins
Zi-Surname and Baekje-Origin Account
The page presents another account: the surname derives from the Zi surname and from descendants in Baekje of Zhong, a collateral son of Jizi of the Shang royal house, constituting Sinicization through a surname change. This account is said to be recorded in the Chaoxian Pu Taiyuan Pu.
Reference: 调姓_调姓的来源和历史_百家姓
Research Notes
Limits of Pending and Legendary Claims
Regarding whether the Wacho lineage and the second origin account share the same source, the source explicitly says this requires further investigation. Regarding descendants of Emperor Ling of Han changing their surname to 調 and migrating to Wanuo, the source uses the word “legend,” so it should not be treated as verified history.
Reference: 调姓_调姓的来源和历史_百家姓