The first answer ("he is the father of Helen") might be used in some rare cases. For example, sometimes we will say something like "She was the mother of a young boy" to draw attention to the mother or to be more formal. 99% of cases in both America and England, use the second answer ("He is Helen's father").
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
ftpkidIs the sentence "He is the father of Helen" correct?It is correct. But don't confuse "correct" with "typical" or "usual" or "natural".