The "Good", the Bad, and the Ugly

Well, the "good" is guaranteed, anyway. Whether they're bad or ugly is subject to individual tastes!

In cultures where name-meanings hold great importance (which is most ancient cultures, as far as I can tell), often one element is quite common, occurring in dozens of names: -gwen- in Welsh, for instance, or -el- and -iah- in Hebrew. 
While we're swimming in El-s today (named for the nicknames, of course, though, not the meaning), the ancient Greeks seem to have been swimming in Eu-s.
Although only a couple names have survived to modern usage in English ("modern" being relative, as they're still too fusty for many parents), there were numerous Eu-names in use in ancient times, on both genders.
Now, in Modern Greek, ευ is said "ev"or "ef", but in Ancient Greek, it was a diphthong--"eh-oo". In English, this was, of course, simplified to "yoo".

*yes, some of the meanings are a bit odd or insulting to modern ears, but many were originally from legend/mythology, where the names were linked to the character's place/role. There's also the whole "completely different culture" thing. :)

Boys:

• Euandros (yoo-AHN-dros)--"good man" [Evander in modern English]
• Euangelos (yoo-AHN-jel-os)--"good messenger"
• Euaristos (yoo-ah-RIS-tos)--"well-pleasing" [Évariste in modern French]
• Eukleides (yoo-KLAY-des)--"good glory" [Euclid in modern English]
• Eugenios (yoo-GEN-ee-os)--"well-born" [Eugene in modern English]
• Euphemios (yoo-FEM-ee-os)--"speaks well"
• Euphranor (YOO-fran-or)--"good mind"
• Euripides (yoo-RIP-ih-dees)--"good throw"
• Eusebios (yoo-SEB-ee-os)--"good worship"
• Eustachys (yoo-STAH-khis)--"good grain" [Eustace in modern English]
• Eustathios (yoo-STAH-thee-os)--"good" +  "stable"
• Eustorgios (yoo-STOR-gee-os)--"good affection"
• Eutropios (yoo-TROP-ee-os)--"good character"
• Eutychus (yoo-TYE-kus)--"good fortune"

Girls:

• Euadne (yoo-AHD-nee)--"good" + " holy"
• Euagora (yoo-AH-gor-ah)--"good assembly"
• Euanthe (yoo-AHN-thee)--"good flower"
• Euarne (yoo-AHR-nee)--poss. "good sheep"
• Euboea (yoo-BEE-ah)--prob. "good cattle"
• Eudaimonia (yoo-dye-mon-EE-ah)--"good spirit"
• Eudocia (yoo-DOS-ee-ah)--"good will"
• Eudora (yoo-DOH-rah)--"good gift"
• Eudoxia (yoo-DOKS-ee-ah)--"good fame"
• Eugeneia (yoo-gen-AY-ah)--"well-born" [Eugenia in modern English]
• Eukleia (yoo-KLAY-ah)--"good glory"
• Eukrante (yoo-KRAHN-tee)--poss. "good accomplishment"
• Eulalia (yoo-LAH-lee-ah)--"speaks well"
• Eulimene (yoo-LEE-men-ee)--"good harbour"
• Eumelia (yoo-MEH-lee-ah)--"good song"
• Eunice (YOO-nis, yoo-NEE-see)--"good victory"
• Eumolpe (yoo-MOL-pee)--"good singer"
• Eunomia (yoo-NOM-ee-ah)--"good order"
• Eunostos (yoo-NOS-tos)--"good yield"
• Eupheme (yoo-FEM-ee)--"speaks well" [Euphemia in modern English]
• Euphrasia (yoo-FRAHS-ee-ah)--"good cheer"
• Euphrosyne (yoo-FROS-in-ee)--"good cheer"
• Eupompe (yoo-POM-pee)--"good escort"
• Euporia (yoo-POR-ee-ah)--"good journey"
• Eupraxia (yoo-PRAHKS-ee-ah)--"good conduct"
• Eusebia (yoo-SEB-ee-ah)--"good worship"
• Euterpe (yoo-TEHR-pee)--"good" + " delight"
• Euthalia (yoo-THAH-lee-ah)--"blossoming well"
• Euthemia (yoo-THEH-mee-ah)--"good order"
• Euthenia (yoo-THEH-nee-ah)--poss. "good supply"
• Euthymia (yoo-THEE-mee-ah)--"good spirit"
• Eutropia (yoo-TROP-ee-ah)--"good character"
• Eutychia (yoo-TYE-kee-ah)--"good fortune"

Honorable mention goes to Evangeline, which, although derived from Greek ("good news"), has no record of use before Longfellow's poem, "Evangeline".