eftsoons (adv.)

obsolete or archaic way of saying "soon afterward," from Old English eftsona "a second time, repeatedly, soon after, again," from eft "afterward, again, a second time" (from Proto-Germanic *aftiz, from PIE root *apo- "off, away") + sona "immediately" (see soon). With adverbial genitive. Not in living use since 17c.