Ok so here’s the laydown on the characters:
Queen Chrysalis X Queen Cadance X King Shining Armor
- Philautia (youngest, female)
- Eros (oldest, male)
- Guardia Valiante (second youngest, male)
- Flurry Heart (second oldest, female)
Queen Twilight Sparkle X Queen Fluttershy
- Evening Star (oldest, female)
- Yet to be designed (youngest, male)
Rainbow Dash X Rarity
- Prismatic Cascade (female)
Sugar Belle X Big Mac
- Red Delicious (oldest, male)
- Envy (youngest, female)
Applejack X Pinkie Pie
- Autumn Glory (oldest, male)
- Angel Rose (adopted; youngest, female)
Sunset Shimmer X Starlight Glimmer X Trixie Lulamoon
- Sunlit Glory (middle-child, male)
- Crescent Moon (youngest, male
- Seafoam (oldest, female)
Discord X Spike
- Indigo Clutter (female)
Queen Tempest Shadow X Queen Luna
- Scarlet Dusk (male)
Queen Celestia X King Thorax
- Gossamer Sunrise (female)
Prince Thorax X Dragon Lord Ember
- Scarab (male)