godsend (n.)youdaoicibaDictYouDict
"unlooked-for acquisition or good fortune," 1812, earlier "a shipwreck" (from the perspective of people living along the coast), by 1806, from Middle English Godes sonde (c. 1200) "God's messenger; what God sends, gift from God, happening caused by God," from God + Middle English sonde "that which is sent, message," from Old English sand, from sendan (see send (v.)).
The common people in Cornwall call, as impiously as inhumanely, a shipwreck on their shores, "a Godsend." [Rev. William Lisle Bowles, footnote in "The Works of Alexander Pope," London, 1806]
godson (n.)youdaoicibaDictYouDict
"male child one sponsors at baptism," c. 1200, from God + son, replacing or modifying Old English godsunu.
godspeed (interj.)youdaoicibaDictYouDict
also God speed, by late 14c., "(I wish that) God (may) grant you success," from God + speed (v.) in its old sense of "prosper, grow rich, succeed." Specifically as a salutation by mid-15c. Also in Middle English as an adverb, "quickly, speedily" (early 14c.); the then-identically spelled God and good seem to be mixed up in this word. From late 13c. as a surname. He may bidde god me spede is found in a text from c. 1300.