Charles Ellicott Commentary Isaiah 54:5

"For thy Maker is thy husband; Jehovah of hosts is his name: and the Holy One of Israel is thy Redeemer; the God of the whole earth shall he be called." — Isaiah 54:5 (ASV)

The Lord of Hosts ... the Holy One of Israel. —We note the combination of the two names so prominent in 1 Isaiah. The “Redeemer” in this context suggests the idea of the next of kin (such, e.g., as Boaz was to Ruth), taking on himself the kinsman’s duty of protection (Ruth 4:4–6).