Manu Ancestor of Germans.

Kashyapa is regarded as the father of humanity. Vivasvan or Surya, son of Kashyapa and Aditi. Vaivasvata Manu, because he is the son of Vivasvan and Saranyu (Saṃjñā). He is also known as Satyavrata and Shraddhadeva.

1. Brahma
2. Marichi, one of the 10 Prajapatis created by Brahma.
3. Kashyapa, son of Marichi and his wife, Kala. Kashyapa is regarded as the father of humanity.
4. Vivasvan or Surya, son of Kashyapa and Aditi.
5. Vaivasvata Manu, because he is the son of Vivasvan and Saranyu (Saṃjñā). He is also known as Satyavrata and Shraddhadeva.

The present Manvantara is named after Vaivaswatha.

He is also called Satyavrata Manu.

Forewarned of a Tsunami,Manu who was a King in Dravida Desa,areas south of Vindhya mountains, meditated near Madagascar and then left for Ayodhya with his son ,Ikshvaku, who founded the Ikshvaku,The solar dynasty to which Lord Rama belongs.

Manu .

The term Man is from Manu who is considered to be the First Man.

World abounds in Great Flood legends and one finds it among all Religions,Judaism,Christianity,Islam,Buddhism and also among tribals and Aborigines.

All world Literatures speak of the Great Flood.

So the question of Migration.

Who migrated from where?

I have written quite a few articles on this and the migration seems to have been from  around the present geographical location of India and Madagascar.
One must remeber here that the ancient land mass wzs different from what we find today.

So Manu or his progenies must have been present everywhere and in every culture.

The Germanic Tribes ascribe their ancestry to Manu.

‘Mannus, according to the Roman writer Tacitus, was a figure in the creation myths of the Germanic tribes. Tacitus is the only source of these myths.

Tacitus wrote that Mannus was the son of Tuisto and the progenitor of the three Germanic tribes Ingaevones, Herminones and Istvaeones. In discussing the German tribes Tacitus wrote:

In ancient lays, their only type of historical tradition, they celebrate Tuisto, a god brought forth from the earth. They attribute to him a son, Mannus, the source and founder of their people, and to Mannus three sons, from whose names those nearest the Ocean are called Ingvaeones, those in the middle Herminones, and the rest Istvaeones. Some people, inasmuch as antiquity gives free rein to speculation, maintain that there were more sons born from the god and hence more tribal designations—Marsi, Gambrivii, Suebi, and Vandilii—and that those names are genuine and ancient. (Germania, chapter 2)’

According to Tacitus‘s Germania (AD 98), Tuisto (or Tuisco) is the divine ancestor of the Germanic peoples. The figure remains the subject of some scholarly discussion, largely focused upon etymological connections and comparisons to figures in later (particularly Norse) Germanic mythology.

The Germania manuscript corpus contains two primary variant readings of the name. Root of the word is from the Hindu Vedic ‘Tvasthar’ – father of Manu. The most frequently occurring, Tuisto, is commonly connected to the Proto-Germanic root *tvai – “two” and its derivative *tvis – “twice” or “doubled”, thus giving Tuisto the core meaning “double”. Any assumption of a gender inference is entirely conjectural, as the tvia/tvis roots are also the roots of any number of other concepts/words in the Germanic languages. Take for instance the Germanic “twist”, which, in all but the English has the primary meaning of “dispute/conflict”.

In the historical Vedic religion, Tvaṣṭṛ is the first-born creator of the universe. The Purusha Sukta refers to the Purusha as Tvastr, who is the visible form of creativity emerged from the navel of the invisible Vishvakarman. In the Yajurveda, Purusha Sukta and the tenth mandala of the Rigveda, his character and attributes are merged with the concept of Hiranyagharbha/Prajapathy or Brahma.

Brahma was also called Tvashta and that makes Him as the ancestor of Germanic people.

The second variant of the name, occurring originally in manuscript E, reads Tuisco. One proposed etymology for this variant reconstructs a Proto-Germanic *tiwisko and connects this with Proto-Germanic *Tiwaz, giving the meaning “son of Tiu”. This interpretation would thus make Tuisco the son of the sky-god (Proto-Indo-European *Dyeus) and the earth-goddess

Thithi is the wife of Kasyapa and Kasyapa’s son was Manu.

This interpretation also points out the origin of Germanic people is Manu.

References and Citations.

https://en.m.wikipedia.org/wiki/Mannus