[ronyclau]

That common character is called a generation name, as it is shared among the same generation in a family. This practice is seen much less commonly in recent times. For example, none of my friends bear a name in this format.

However, sometimes while siblings share a common character in their name, it may not a generation name. Some parents like to name their children this way, though in such case, the common character may appears in any position of the given name. So it's kinda hard to tell whether it's a generation name thing just by the name, without consulting the name bearer themselves or their parents.