Small numbers (less than 20) are usually spelled out, while large numbers are given as a numeral. A small number should be spelled out if it is the first word in a sentence, especially if the value is less than 20, but other numbers may be given as numerals in the same sentence. In general, it is best to avoid starting a sentence with a numeral.
In total, 28 names appear in the material. Thirteen can be categorized as male names and 12 are probably female names. Two transliterated names could belong to either gender.
Note that the word “one” is often used as a pronoun, and in this usage, it must be spelled out and cannot be replaced by a numeral.