Half-Aelfe
Many sentient races have found love over the centuries but when it comes to breeding it becomes a little more complicated. A safe birth is mostly seen from a same species birth but there has been rare cases of a few half species being born. Foulspawn interbreed between the goblins, orcs and ogres but mostly the species of the mother dictates the species of the baby, no matter what species the father is from, the egg is still fertilized.
Any ogre and gaulan relationship would create a half ogre, although they are mostly ogre in appearance. They usually gain some features from their human parent but mostly resemble their ogre kin. Half ogres are looked down upon by many of their own kind, almost as much as most ogres despise Brute Ogres. Many believe this stems from the lighter skin of the brute ogres resembling the more gaulan like pigment as opposed to the green or red skin of many ogres in galfin.
Aelves and Foulkin cannot breed and their relationships are looked down upon by caste and tribe alike. Not saying there have never been relationships between the two, they are just uncommon.
Aelves are a little more unique in that there body makeup is meant for evolution. Half aelves may resemble a human but overtime their elf genealogy will take over. Elves gain their physical and magical features from the geography that surrounds them, even over one generation a change can be seen. Because of this, half aelves DNA quickly changes to more of that of an aelfe. Thus the first generations may share some features from the human parent but soon after, and even in that half elfes own lifetime, their features will take on more aelfe in appearance.
There are no half dwarves or halflings. Once again there are the occasional relationship but no spawn has ever came to birth with these races.