When i get a toddler who has the same name as a villager close in age i take 2 letters from each of the parents & make a new name ie: Keli & Aika had a son with same name as villager a few years older, so renamed him KeTa. Bindi & Tatoo had a daughter same name again so called her TaBi. I do have a few with same names but they are 2 or 3 generatins apart like Jade, Jade2, Jade3 ect.