Displayed are the meanings that I could find.
If you can help me with the missing name meanings you can e-mail me. Thanks.

Trevor Thornton Hurst

Trevor is of Celtic/Welsh origin. Means: Man of wisdom; discreet. It's source is Trefor, a Welsh name meaning "Great settlement." Ranked 318th in popularity for males of all ages in a sample of the 1990 US Census. The name also ranked 60th for males born in the United States in 1994.

Thornton is an Old English expression meaning "Thorn-bush settlement.", and "From the thorny village".

Hayhurst, Hurst is of British and/or Irish origin.

Dan Yaremko

Daniel is of Hebrew origin. It means 'My judge is the Lord'. Ethnic backgrounds include; Scottish, Swedish, Swiss, Hebrew, English/Welsh, French, German, and Hispanic. It's religious association is biblical.

Yaremko is of Ukrainian descent. It's meaning is actually "jugular vein". (Thanks, Dan!)

Johnny Haro

Johnny is also of Hebrew origin. Meaning: The Lord is gracious; gift of God.

'Ziggy' David Sigmund

David is another that bears Hebrew origin, meaning Friend or Beloved. Was the second and greatest of the kings of Israel.

Sigmund is a German patronymic name. Sigi=victory + mund=protection.