Israel has twelve tribes, as Ishmael had “twelve princes according to their nations” (Genesis 25:16). The resemblance shows twelve symbolizing tribal and national completeness, like the year’s twelve months.

Twelve remains constant in Israel’s identity, while composition varies with context, showing different biblical forms of identity according to the dimension considered.

Initially the twelve are Jacob’s direct sons:

Reuben, Simeon, Levi, and Judah; Issachar, Zebulun, and Benjamin; Dan and Naphtali, Gad and Asher. (Exodus 1:2–4)

רְאוּבֵן, שִׁמְעוֹן, לֵוִי, וִיהוּדָה; יִשָּׂשכָר, זְבוּלֻן, וּבְנְיָמִן; דָּן, וְנַפְתָּלִי, גָּד, וְאָשֵׁר. (שמות א', ב-ד)

For land inheritance, composition changes. Near death Jacob determined Manasseh and Ephraim would replace Joseph with standing equal to his other sons:

Ephraim and Manasseh, even as Reuben and Simeon, shall be mine. (Genesis 48:5)

אֶפְרַיִם וּמְנַשֶּׁה, כִּרְאוּבֵן וְשִׁמְעוֹן יִהְיוּ לִי. (בראשית מ"ח, ה)

He thereby gave Joseph a double portion, as beloved Rachel’s firstborn. Levi, chosen for sacred service, received no inheritance (Deuteronomy 10:8–9), only dwelling cities (Numbers 35:1–3). Twelve therefore inherited tribal lands: Jacob’s ten sons apart from Levi and Joseph, plus Manasseh and Ephraim replacing Joseph.

Another twelve comprises those whose blessing founded an independent identity, expressed by a distinct inheritance, tribal subdivision, or separate status.

Only ten sons, including Joseph, actually received blessings. Simeon and Levi received a curse for Shechem: “Simeon and Levi are brethren; Weapons of violence their kinship … Cursed be their anger, for it was fierce, And their wrath, for it was cruel” (Genesis 49:5, 7).

Their curse withheld independent inheritance: “I will divide them in Jacob, And scatter them in Israel” (Genesis 49:7). Levi had none; Simeon’s lay inside Judah’s: “therefore the children of Simeon had inheritance in the midst of their inheritance” (Joshua 19:9).

Manasseh and Ephraim received Jacob’s blessing (Genesis 48:20) and distinct inheritances. Joseph himself received Shechem personally: “Moreover I have given to thee one portion above thy brethren” (Genesis 48:22), and was buried there (Joshua 24:32). The Hebrew shekhem, translated “portion” by JPS, is read here as the place Shechem. Twelve thus also survives in blessing and distinct identity.

The overall picture maintains twelve as national completeness while composition varies: direct sons in the family dimension; Manasseh and Ephraim replacing Levi and Joseph in inheritance; and Ephraim and Manasseh, alongside Joseph, replacing Simeon and Levi in blessing and distinct identity.

Israel’s identity is therefore multilayered, its biblical dimensions jointly forming one whole: twelve tribes, one people.