/// <summary> /// Determines whether the ProperNoun's text corresponds to a last name in the English /// language. Lookups are performed in a case insensitive manner and currently do not /// respect plurality. /// </summary> /// <param name="proper">The ProperNoun to check.</param> /// <returns> /// <c>true</c> if the ProperNoun's text corresponds to a last name in the English language; /// otherwise, <c>false</c>. /// </returns> public static bool IsLastName(this ProperNoun proper) => NameData.IsLastName(proper.Text);