וַתִּקְרָ֧א אֶת־שְׁמ֛וֹ יוֹסֵ֖ף לֵאמֹ֑ר יֹסֵ֧ף יְהוָ֛ה לִ֖י בֵּ֥ן אַחֵֽר׃
At tinawag niya ang kanyang pangalan na Jose, na sinasabi: “Dagdagan nawa ako ng Walang-Hanggan ng isa pang anak na lalaki.”
Rashi
יסף ה' לי בן אחר THE ETERNAL WILL ADD TO ME ANOTHER SON — She knew prophetically that Jacob would rear only twelve tribes. She therefore prayed: “May it be God’s will that the tribe which he is yet destined to rear may issue from me”. For this reason she prayed only for one other son (Genesis Rabbah 72:6).
Rashbam
ותקרא את שמו יוסף. An allusion to G’d having removed her shame, אסף את חרפתי. If this is correct, she should have called him אסף; why did she add the letter י? This is because she had prayed for another son, saying יוסף ה' לי בו אחר. We find therefore that the name she gave this child symbolises two thoughts of its mother both of which she had already articulated.
Radak
ותקרא...בן אחר. Rachel meant that she hoped for at least one more son.