YOU SAID:

If I get a horse I will name it greg because greg is a cool name

INTO JAPANESE

私は馬を手に入れたらグレッグと名付けます

BACK INTO ENGLISH

I will name Greg when I get a horse

INTO JAPANESE

馬に乗ったらグレッグと名付けます

BACK INTO ENGLISH

If you ride a horse, name it Greg

INTO JAPANESE

馬に乗る場合は、グレッグと名付けます

BACK INTO ENGLISH

If you ride a horse, name it Greg