Who bought Joseph: Ishmaelites or Midianites?

[TonyChanYT]

Genesis 16:

11 the angel of the LORD said to her [Hagar], “Behold, you are pregnant and shall bear a son. You shall call his name Ishmael, because the LORD has listened to your affliction.

Genesis 25:

1 Now Abraham had taken another wife, named Keturah, 2 and she bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah.

Medan and Midian were stepbrothers of Ishmael.

Years later, Joseph's brother sold Joseph in Genesis 37:

25 Then they [Joseph's brothers] sat down to eat. And looking up they saw a caravan of Ishmaelites coming from Gilead, with their camels bearing gum, balm, and myrrh, on their way to carry it down to Egypt. 26 Then Judah said to his brothers, “What profit is it if we kill our brother and conceal his blood? 27Come, let us sell him to the Ishmaelites, and let not our hand be upon him, for he is our brother, our own flesh.” And his brothers listened to him. 28 Then Midianite traders passed by. And they drew Joseph up and lifted him out of the pit, and sold him to the Ishmaelites for twenty shekelsc of silver. They took Joseph to Egypt.

Who bought Joseph: Ishmaelites or Midianites?

8 verses later, Young's Literal Translation:

36 the Medanites have sold him unto Egypt, to Potiphar, a eunuch of Pharaoh, head of the executioners.

Who bought Joseph: Ishmaelites or Midianites or Medanites?

Pulpit explained:

the Midianites - or Medanites, descendants of Medan, a brother of Midian, both of whom were sons of Abraham by Keturah (Genesis 25:2). That the Arabian merchants are called Ishmaelites (ver. 27), Midianites (ver. 28), and Medanites (ver. 36), is explained as an evidence of varying legends (Tuch, Bleek, Davidson, Colenso), but is better accounted for as indicating that the traders were composed of men of various nations (Clericus); that the Midianites, Ishmaelites, and Medanites were often confounded from their common parentage and closely similar habits (Keil); that the narrator did not intend to lay stress upon the nationality, but upon the occupation, of the travelers (Havernick); that the proprietors of the caravan were Ishmaelites, and the company attending it Midianites or Medanites (Lange); … that the Midianites or Medanites were the actual purchasers of Joseph, while the caravan took its name from the Ishmaelites, who formed the larger portion of it (Murphy) - sold him into Egypt (i.e. having brought him into Egypt,

Who bought Joseph: Ishmaelites or Midianites or Medanites?

All of them.