These words translate one word with which the speaker calls for the attention of the hearer and indicates that the words that follow are a plea. If your language has another way of saying the same thing, you may want to use it here.
This is the name of God that he revealed to his people in the Old Testament. See the translationWord page about Yahweh concerning how to translate this.
Since Nehemiah is speaking to Yahweh, the pronouns "him" and "his" can be translated as "you" and "your." Alternate translation: "who love you and keep your commandments" (See: [[rc://en/ta/man/jit/figs-123person]])