The name LORD (Heb. Yahweh) means that God is the "self-existent One" (Exodus 3:14; 6:3; see also I AM) and is written with all capitals in the NASB. Although properly a title, it is used as God's personal name (cf. Psalms 144:15; Isaiah 37:20) and emphasizes His faithful presence and redemptive, covenant relationship with His people (Exodus 3:12-15; cf. 6:2-8; Deuteronomy 7:9; Ezekiel 37:26-28; 48:35). The full redemptive knowledge of the name LORD was not made known until Israel's experience under Moses (Exodus 6:3). It is called "this honored and awesome name" (Deuteronomy 28:58) or simply "the Name" (Leviticus 24:11). The form "Lord" (Heb. Adonay or Adon) means that God is "Lord" or "Master" in relation to His people as His servants and in the NASB is translated with only an initial capital when used of deity. This name is less intimate than the foregoing name LORD and is used of both deity and humanity (e.g., Genesis 18:12; Psalms 110:1). It is sometimes substituted for God's personal name (Yahweh, LORD) as a precaution against taking the latter name in vain (cf. Exodus 20:7). The primary word for Lord in the NT (Gr. kurios) is used to translate either Yahweh (Matthew 22:44; cf. Psalms 110:1, LORD) or Adonay (Matthew 22:44; cf. Psalms 110:1, Lord). Another word translated "Lord" or "Master" (Gr. despotes) occurs several times in the NT and indicates either deity (Luke 2:29; Acts 4:24; 2 Timothy 2:21; 2 Peter 2:1; Jude 4; Revelation 6:10) or a human "lord" or "master" (1 Timothy 6:1-2; Titus 2:9; 1 Peter 2:18).
This topic is from the Lockman Foundation.