Where does “liub” come from?

liub (Old High German) comes from Proto-Germanic leubaz, from Proto-Indo-European lewbʰ-, from Proto-Indo-European lēw- — to sound, resound, sing out; to leave.

Ancestry of “liub”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	leubaz	dear, beloved
2	Proto-Indo-European	lewbʰ-	to desire, covet, want; to admire, praise; to...
3	Proto-Indo-European	lēw-	to sound, resound, sing out; to leave

Every word from Proto-Indo-European lēw- →Every word from Proto-Indo-European lewbʰ- →Every word from Proto-Germanic leubaz →