The pronunciation of “诒琛” is “yí chēn”. In English, “yí” can be pronounced similar to “ee” in “meet”. “chēn” can be pronounced similar to “chin” but with a “sh” sound at the beginning, so it's like “shin”. Overall, it can be roughly pronounced as “ee shin”. These are just approximations as Chinese characters' pronunciations might not have exact one-to-one equivalents in English. ????