Hermann, Pernille, Stephen A. Mitchell, and Jens Peter Schjødt, eds., with Amber J. Rose. 2017. Old Norse Mythology—Comparative Perspectives. Milman Parry Collection of Oral Literature 3. Cambridge, MA: Milman Parry Collection of Oral Literature. http://nrs.harvard.edu/urn-3:hul.ebook:CHS_HermannP_etal_eds.Old_Norse_Mythology.2017.
Ymir in India, China—and Beyond
Vǫluspá 3–4, 19 in the Poetic Edda has this shorter version:
vara sandr né sær né svalar unnir;
iorð fannz æva né upphiminn,
gap var ginnunga en gras hvergi.
(Early in time Ymir made his settlement,
there was no sand nor sea nor cool waves;
earth was nowhere nor the sky above,
a void of yawning chaos, grass was there nowhere.)
4 Áðr Burs synir bioðum um ypþo,
þeir er miðgarð mœran scópo;
sól skein sunnan á salar steina,
þá var grund gróin grœnum lauki.
(before the sons of Bor brought up the land-surface, 
those who shaped glorious Midgard; 
the sun shone from the south on the stone-hall,
then the ground was grown over with green leek.)
19 Ask veit ec standa, heitir Yggdrasill,
hár baðmr, ausinn hvítaauri;
þaðan koma dǫggvar, þærs í dala falla,
stendr æ yfir, grœnn Urðar brunni.
(An ash I know that stands, Yggdrasill  it’s called,
a tall tree, drenched with shining loam;
from there come the dews which fall in the valley,
green, it stands over Urd’s well.) 
en ór sveita sær,
biorg ór beinum, baðmr ór hári,
en ór hausi himinn.
(From Ymir’s flesh the earth was created,
and from his blood, the sea,
mountains from the bones, trees from this hair,
and from his skull, the sky.) 
The corresponding Old Indian hymn from the Ṛgveda (10.90), quoted above, often reads like a translation of the Norse text, or vice versa. Their close correspondence opens up the possibility that this is an old, Indo-European idea.  This is strengthened by the closely related Old Norse myth of the god, Óðinn (Odin), who hung himself on the tree Yggdrasill for nine  days and nights as an offering by himself to himself. This again has a Vedic parallel, in that “the gods offered the sacrifice with the sacrifice” (RV 1.164.50, cf. 10.90.16, above). 
Descent of Ymir/Yama
Nuristani and Mediterranean reminiscences
In Rome, the mythical founder figure Romulus’ kills his brother Remus < Proto-Indo-European *Yemo-s, representing the Indian Yama and Old Iranian Yima.  Like Remus, Yima is killed by his brother Spitiiura. 
- First there was the great cosmic egg.  Inside the egg was Chaos, and floating in Chaos was P’an ku, the undeveloped, the divine embryo. And P’an ku burst out of the egg […] with an adze in his hand with which he fashioned the world […] He chiseled the land and sky apart. He pulled up the mountains on the earth and dug the valleys deep, and made courses for the rivers. High above ride the sun and moon and stars in the sky where P’an ku placed them; below roll the four seas […] 
- The world was never finished until P’an ku died […] [F]rom his skull was shaped the dome of the sky, and from his flesh was formed the soil of the fields; from his bones came the rocks, from his blood the rivers and seas; from his hair came all vegetation. His breath was the wind; his voice made thunder; his right eye became the moon, his left eye the sun.  From his saliva or sweat came rain. And from the vermin which covered his body came forth mankind. 
The Universe was in darkness, with water everywhere.
There was no glimmer of dawn, no clearness, no light.
And he began by saying these words—
That he might cease remaining inactive:
“Darkness become a light-possessing darkness”.
And at once light appeared […] 
Then (he) looked to the waters which compassed him about,
and spake a fourth time, saying:
“The waters of Tai-kama, be ye separate.
Heaven be formed”. Then the sky became suspended.
“Bring forth thou Tupua-horo-nuku”.
And at once the moving earth lay stretched abroad. 
In still another version, the Tahiti creator god is Ta’aroa (Maori Tangaroa, Takaroa; Hawai’ian Kanaloa). 
Related are the (Austric) Borneo and Filipino myths of the origin of animals from different parts of the body of a slain giant. 
Connections between India and South China?
Hittite and East Asian tales of rocks
- Indo-European area (Ymir, Puruṣa): steppe belt, probably in the Pontic area north of the Black Sea, c. 3000–4000 BCE 
- Anatolia and Hurrite: neighboring Caucasus area c. 2000 BCE
- Chinese: with southern non-Han minorities, attested only in the later 1st millennium BCE
- Southeast Asia/Polynesia: emerging from Taiwan and neighboring (non-Han) mainland China, c. 4000 BCE.