The etymology of Celebrindor's name is uncertain. The most likely meaning is "silverlike lord" from celebrin "silver-like (adjective)" and taur, which means among other things "lord".
Sindarin
celebrindor
masculine name. *Silver-lord
Elements
Word Gloss celebrin “like silver (in hue or worth), like silver (in hue or worth), [G.] of silver” -dor “*king, lord”
Celebrindor
Celebrindor
5th king of Arthedain (LotR/1038). His name is most likely a combination of celebrin “silver” and the suffixal form -dor “lord”.
Conceptual Development: In drafts of the Lord of the Rings appendices, this name first appeared as (rejected) N. Celemenegil and N. Celebrindol (PM/208).