Will the intercession of the حافظ القرآن (memorizer of the Qur’an) for ten of his relatives on the Day of Judgment be limited to close relatives, or does it include distant relatives? And what if the entire family enters Paradise? And does the same intercession apply to the martyr for seventy of his relatives?

The Hadith (definition) about the Qur'an memorizer interceding for ten of his family members is weak, whereas the intercession of the martyr for seventy of his family members is authentically established. All intercession is by the permission of Allah Almighty and for whom He is pleased with, and its limits are determined by Allah, not by the intercessor. One should not delve deeply into matters of the unseen.