צָפ֣וֹן וְ֭יָמִין אַתָּ֣ה בְרָאתָ֑ם תָּב֥וֹר וְ֝חֶרְמ֗וֹן בְּשִׁמְךָ֥ יְרַנֵּֽנוּ׃
צפֿון און דָרום – זײ האָסט דו באַשאַפֿן, תּבֿור און חרמון זינגען פֿון דײַן נאָמען.
Bartenura
מים מפכים – as it is written in Ezekiel (47:2): “And I found water was gushing from [under] the south wall,” and that is south which is called “right-hand,” as it is written )Psalms 89:13): “North and south – [You created them; Tabor and Hermon sing forth Your name].” But see Ezekiel in prophecy that they would go out from the House of the Holy of Holies thin like the proboscides of locusts (see Tractate Pesahim, Chapter 3, Mishnah 5), and when they would arrive at this gate, they would grow strong/gather courage and become like the fulness of a small flask/jar and that is why they call them “gushing waters.”
Ramban
‘BEN ONI’ (THE SON OF MY SORROW). I am of the opinion that he was so called because he alone was born in the land of Canaan which lies to the south (yamin) as one comes from Aram-naharaim, just as it is said: In the south, in the land of Canaan;220Numbers 33:40. Going on still toward the south.221Above, 12:9. Binyamin thus means a son of the south, just as in the verse: The north ‘v’yamin’ (and the south) Thou hast created them.222Psalms 89:13. For this reason the name Binyamin is here written “full” [with a yud after the mem to indicate that the name is derived from the word yamin (south)]. This is Rashi’s language.
But I do not understand this claim that the Land of Israel lies to the south of Aram-naharaim for Aram is eastward of the Land of Israel, as it is written, And he came to the land of the children of the east,223Above, 29:1. and it is further written, From Aram Balak bringeth me, the king of Moab from the mountains of the East,224Numbers 23:7. and Jacob crossed the Jordan which is to the east of the Land of Israel, and he returned by way of Edom which is south of the Land of Israel. Thus you find that Aram is south-east of the Land of Israel, and the Land of Israel is to its north. However, if Benjamin was born within the border of Bethlehem Ephrathah which is in the land of Judah — as it is written, Bethlehem in Judah,225Judges 19:2. and it is further written, But thou, Bethlehem Ephratha, which art little to be among the thousands of Judah217Micah 5:1. — this was in the south of the Land of Israel, and he was thus born between Beth-el and Bethlehem Ephrath. And if the place was in the hill country of Ephraim, then it is in the north of the Land of Israel, as it is written, Judah shall abide in his border on the south, and the house of Joseph shall abide in their border on the north.226Joshua 18:5. And if it was in the portion of Benjamin, it was also not in the south, for it is written, And their border was on the north side.227Ibid., Verse 12. Thus in any case there was no reason to call Benjamin “a son of the south.”
The correct interpretation appears to me to be that his mother called him ben oni, and she meant to say, “the son of my mourning,” similar in expression to: bread of ‘onim’ (mourners);228Hosea 9:4. I have not eaten thereof ‘b’oni’ (in my mourning).229Deuteronomy 26:14. And his father understood the word oni in the sense of “my strength,” similar in expression to: the first-fruits of ‘oni’ (my strength);230Genesis 49:3. And to those who have no ‘onim’ (power).231Isaiah 40:29. And therefore he called him Binyamin, “the son of power” or “the son of strength,” for in the right hand (yamin) there is strength and success, just as it is written: A wise man’s understanding is at his right hand;232Ecclesiastes 10:2. Thy right hand shall overtake all those that hate thee;233Psalms 21:9. The right hand of the Eternal is exalted.234Ibid., 118:16. Jacob wanted to call him by the name his mother had called him, for all his children were called by the names their mothers had called them, and he thus rendered it to good and to strength.
Now I have seen in Bereshith Rabbah:23582:10. “Ben oni, ‘the son of my sorrow.’ And his father called him Benjamin, i.e., in the Sacred Language.” I do not know what this means for it is all the Sacred Language, and so are the names of all his sons in the Sacred Language. However, the Rabbis have alluded to that which I have said, namely, that Jacob rendered the expression so that it signified good.
But I do not understand this claim that the Land of Israel lies to the south of Aram-naharaim for Aram is eastward of the Land of Israel, as it is written, And he came to the land of the children of the east,223Above, 29:1. and it is further written, From Aram Balak bringeth me, the king of Moab from the mountains of the East,224Numbers 23:7. and Jacob crossed the Jordan which is to the east of the Land of Israel, and he returned by way of Edom which is south of the Land of Israel. Thus you find that Aram is south-east of the Land of Israel, and the Land of Israel is to its north. However, if Benjamin was born within the border of Bethlehem Ephrathah which is in the land of Judah — as it is written, Bethlehem in Judah,225Judges 19:2. and it is further written, But thou, Bethlehem Ephratha, which art little to be among the thousands of Judah217Micah 5:1. — this was in the south of the Land of Israel, and he was thus born between Beth-el and Bethlehem Ephrath. And if the place was in the hill country of Ephraim, then it is in the north of the Land of Israel, as it is written, Judah shall abide in his border on the south, and the house of Joseph shall abide in their border on the north.226Joshua 18:5. And if it was in the portion of Benjamin, it was also not in the south, for it is written, And their border was on the north side.227Ibid., Verse 12. Thus in any case there was no reason to call Benjamin “a son of the south.”
The correct interpretation appears to me to be that his mother called him ben oni, and she meant to say, “the son of my mourning,” similar in expression to: bread of ‘onim’ (mourners);228Hosea 9:4. I have not eaten thereof ‘b’oni’ (in my mourning).229Deuteronomy 26:14. And his father understood the word oni in the sense of “my strength,” similar in expression to: the first-fruits of ‘oni’ (my strength);230Genesis 49:3. And to those who have no ‘onim’ (power).231Isaiah 40:29. And therefore he called him Binyamin, “the son of power” or “the son of strength,” for in the right hand (yamin) there is strength and success, just as it is written: A wise man’s understanding is at his right hand;232Ecclesiastes 10:2. Thy right hand shall overtake all those that hate thee;233Psalms 21:9. The right hand of the Eternal is exalted.234Ibid., 118:16. Jacob wanted to call him by the name his mother had called him, for all his children were called by the names their mothers had called them, and he thus rendered it to good and to strength.
Now I have seen in Bereshith Rabbah:23582:10. “Ben oni, ‘the son of my sorrow.’ And his father called him Benjamin, i.e., in the Sacred Language.” I do not know what this means for it is all the Sacred Language, and so are the names of all his sons in the Sacred Language. However, the Rabbis have alluded to that which I have said, namely, that Jacob rendered the expression so that it signified good.
Rashi
בנימין BENJAMIN — I am of opinion that he was so called because he alone was born in the land of Canaan which is in the South (ימין) as one comes from Aram-Naharaim, as it is said (Numbers 33:40) “in the South, in the Land of Canaan”, and (12:9) “going on still towards the South”. בנימין therefore means בן ימין where ימין has the same meaning as in (Psalms 89:13) “The North and the South (ימין) Thou hast created them”. For this reason the word is here written plene (with a י after the מ).
Rashi
Another explanation of בנימין is that it means “son of his old days (ימים)”, only that it is written with ן (instead of ם), like (Daniel 12:13) “at the end of days.