This is what I found from (an online version of) the book Kitaabut-Tawḥīd of Abū 'Abdillaah Muhammad ibn Ishaaq Ibn Mandah (with checking, commentary by Dr. Muhammad ibn 'Abdillaah al-Wuhaybi & Dr. Mūsá ibn 'Abdul-'Azīz al-Ghusn):
In the Seerah of ibn Mandah in the book all those who are given the laqab "ibn Mandah" are mentioned:
1) The author's grand father:
al-Muhaddith al-Haafidh Abū 'Abdillaah Muhammad ibn Yahyá ibn Mandah (d. 301)
2) The author's father:
ash-Shaykh al-Muhaddith Abū Ya'qoob Ishaaq ibn Muhammad... ibn Mandah (d. 341)
3) The author:
Muhaddith al-Islām Abū 'Abdillaah Muhammad ibn Ishaaq ... ibn Mandah (d. 395 or 396)
4) The author's son: 'Abdur-Rahmaan ibn Muhammad ... ibn Mandah (d. 470)
5) The author's grandson: Yahyá ibn 'Abdul-Wahhaab ibn Muhammad ... ibn Mandah (d. 511)
6) Abūl-Wafaa' Mahmood ibn Ibrāhīm ibn Sufyaan ibn Ibrāhīm ibn 'Abdul-Wahhaab ibn al-Haafidh Abee 'Abdillaah ibn Mandah
7) Abū Sa'd Aḥmad ibn Ibrāhīm ibn Mandah (d. 351)
Note that 5 of them are closely related: It is mentioned in the Seerah of ibn Mandah in the book that: "Yahya ibn 'Abdul-Wahhaab ibn Muhammad ibn Ishaaq (ibn Muhammad) ibn Mandah - the grandson of the author was a: Muhaddith son of a Muhaddith son of a Muhaddith son of a Muhaddith son of a Muhaddith."
Allaahu Akbar indeed. May Allah help us to follow their footsteps.