“After examining the subject, I came to the conclusion that indeed it is correct to connect the Lurie family back to the Rashi — and from there to Rabbi Yochanan HaSandlar, King Yehizkiyahu and, obviously, to King David,” he wrote. The Guinness Book of Records has also accepted the Luries as the oldest-known living family in the world today, citing them in the “longest lineage” category in its 1999 edition.
Source: wiktionary