Quarter Elf

If a human mates with a half elf roll a d4 to establish what race their child will be: Any human mating with a "quarter elf" will result in a human will subtle elf features
 * 1) Human
 * 2) 1/4 elf with human dominant trait, treat as human
 * 3) 1/4 elf with elf dominant trait, treat as half-elf
 * 4) 1/2 elf

Any elf meating with a quarter elf will result in a half elf.

(An elf and half elf mating results in an elf)