Jehovah
Now when the adversaries of Judah and Benjamin heard that the children of the captivity builded the temple unto the LORD God of Israel; Ezra 4:1–3
The leaders refuse a mixed worship and insist on building the temple to Jehovah, the God of Israel, who is the premortal Jesus Christ. His house is to be built on His terms, not blended with other gods.
AttestedJehovah — the LORDA divine name
How we know: Jehovah is the premortal Christ (Abraham 1:16; D&C 110:3–4)