Tafsiran Rut 4:1: Rashi, Ibn Ezra & Tze'enah Ure'enah

So-and-so. But his name was not written because he did not wish to redeem.¹The person’s name was Tov (See above 3:13). His name is omitted because he did not discharge his duty as a kinsman. He therefore did not merit to be recorded as Tov [=good].

"Went up to the gate. Indeed, it was the custom and law for the community."...

So-and-so. פְּלֹנִי אַלְמֹנִי is rendered [into Aramaic] in the Prophets as, “concealed and secret.”

So. פְּלֹנִי means] covered and concealed, [as in] the expression of, “If there be concealed יִפָּלֵא”²Devarim 17:8. and “Is there anything concealed הֲיִפָּלֵא from Adonoy?”³Bereishis 18:14.

And so. אַלְמֹנִי means widowed, without a name. (Another version: [He is called] אַלְמֹנִי because he was widowed of the words of the Torah, for he should have expounded, “[only] an Ammonite [is forbidden in marriage to a Jewish woman], but not an Ammonitess [i.e., an Ammonite woman is not forbidden in marriage to a Jewish man]; a Mo’avite, but not a Mo’aviteess.” Yet he said, “for I would mar my own inheritance.”)