YOU SAID:

They are not the only ones whose parents are the people of july

INTO JAPANESE

両親が7月の人々であるのは彼らだけではありません

BACK INTO ENGLISH

They're not the only ones whose parents are July people

INTO JAPANESE

両親が7月人なのは彼らだけではない

BACK INTO ENGLISH

They're not the only ones whose parents are July people