Email-Generator | A Simple email generator that might be | Email library

This isn't something you want to guess at. People aren't fond of you getting their gender wrong.

If you guess based on their first name, you'll be wrong sometimes. Many first names are used for both men and women. In your link with the names, look for the names marked with a star (like Lindsay, Morgan, Sasha, Jody, etc.).

Plus, at least in English, women use different titles depending on their marital status (Mrs, Miss, Ms). Or you might have some PhD's who prefer you address them by Dr.

Phylogenesis (in the comments) has the right idea. Use the personalTitle attribute to store the title. It'll be difficult to populate that for all of your accounts, but that's the only way to do this right without ever being wrong.