🔼The name YHWH-shalom in the Bible
The name YHWH-shalom belongs to an altar which Gideon built in Ophrah of the Abiezrites, right after a visiting angel demonstrated his reality, and right before Gideon destroyed his town's altar of Baal and associated Asherah (Judges 6:24).
See for a discussion on the significance of altars — in ancient and modern times — our article on the verb זבח (zabah), meaning to slaughter or sacrifice, and the noun מזבח (mizbeah), meaning altar.
🔼Etymology of the name YHWH-shalom
The name YHWH-shalom obviously consists of two elements, the first one being YHWH, the name of the Lord. Please see our article on that name for a look at the meaning and significance of that name.
The second part of our name comes from the familiar verb שלם (shalem), meaning to be unbroken or whole:
The phrase יהוה שלום is used as a name in Judges 6:24, but it also occurs in the previous verse and is obviously an application of it. In English this nuance is sadly lost, but the Hebrew literally reads: "and said (אמר, 'amar) to him YHWH peace to you no-fear no dying". Something quite similar is noted by Jeremiah: "and spoke (דבר, dabar) YHWH peace shall be to you..".
Biblical Hebrew only sparsely uses the verb to be, and our name can be translated in several ways: The Lord Of Peace, The Lord Is Peace, and even The Peace Of The Lord.