What does it mean when God's name is carried by someone else?

²⁰Behold, I send an Angel before thee, to keep thee in the way, and to bring thee into the place which I have prepared. ²¹Beware of him, and obey his voice, provoke him not; for he will not pardon your transgressions: for my name is in him. ²²But if thou shalt indeed obey his voice, and do all that I speak; then I will be an enemy unto thine enemies, and an adversary unto thine adversaries. ²³For mine Angel shall go before thee, and bring thee in unto the Amorites, and the Hittites, and the Perizzites, and the Canaanites, the Hivites, and the Jebusites: and I will cut them off.

³⁶But I have greater witness than that of John: for the works which the Father hath given me to finish, the same works that I do, bear witness of me, that the Father hath sent me. ³⁷And the Father himself, which hath sent me, hath borne witness of me. Ye have neither heard his voice at any time, nor seen his shape. ³⁸And ye have not his word abiding in you: for whom he hath sent, him ye believe not. ³⁹Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me. ⁴⁰And ye will not come to me, that ye might have life. ⁴¹I receive not honour from men. ⁴²But I know you, that ye have not the love of God in you. ⁴³I am come in my Father’s name, and ye receive me not: if another shall come in his own name, him ye will receive. ⁴⁴How can ye believe, which receive honour one of another, and seek not the honour that cometh from God only?

⁷And to the angel of the church in Philadelphia write; These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth; ⁸I know thy works: behold, I have set before thee an open door, and no man can shut it: for thou hast a little strength, and hast kept my word, and hast not denied my name. ⁹Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee. ¹⁰Because thou hast kept the word of my patience, I also will keep thee from the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth. ¹¹Behold, I come quickly: hold that fast which thou hast, that no man take thy crown. ¹²Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God, which is new Jerusalem, which cometh down out of heaven from my God: and I will write upon him my new name. ¹³He that hath an ear, let him hear what the Spirit saith unto the churches.