Garth

Earth-One / Post-Crisis / New Earth
Garth and Tula’s love grew, as they became a long-standing couple The pair attended Donna Troy’s wedding briefly stealing away to enjoy a romantic skinny-dip in Steve Dayton’s pool (Tales of the Teen Titans #50, 1984).
 * 1)  Tula / Aquagirl  - Garth, appearing as the superhero Aqualad, and Tula, a girl from Atlantis, first met when they were both  hypnotized into aiding the evil Dr. Dorsal before realizing the error of their wild ways. But the Atlantean teens continued to make waves, as Tula adopted the name Aquagirl  and helped overthrow the evil Narkran (Aquaman #42-49).

Sadly, their long-standing love was cut short during the Crisis when Aquagirl gave her life defending Atlantis from the evil Chemo. (Crisis on Infinite Earths #9-10) A devastated Garth mourned her death for years, before finally coming to a peace and laying their love to rest (Tempest #4, 1996).

2.  Omen 

3.  Dolphin  - These two married and had a child.

Kingdom Come

 * 1)  Dolphin  - He is also married to Dolphin in this continuity.