Especially, the posthumous names from Emperor Ojin through Emperor Keitai are generally simple and there are ones such as Wakatakeru, which were clearly proven to be the real names when alive.
とくに応神天皇から継体天皇にかけての名は概して素朴であり、ワカタケルのように明らかに生前の実名と証明されたものもある。