A more thorough explanation:

Saunkefin is a historical term that refers to the end of a family line of succession due to a lack of heirs. It means the failure of a line of succession. - The saunkefin of the Tudor dynasty occurred when Queen Elizabeth I died childless, leading to the succession of the Stuart dynasty. - The saunkefin of the Habsburg dynasty occurred when Charles II of Spain died without an heir, leading to the War of the Spanish Succession. These examples illustrate how saunkefin can have significant political and historical consequences, as the lack of a clear successor can lead to power struggles and conflicts.