Father of a Thousand Bastards

A male character with a lot of children out of wedlock, almost always with multiple women. This trope has nothing to do with Mother of a Thousand Young.

Film

 * The concept of Delivery Man takes on this trope as it focus on David Wozniak, who donated his sperm two decades earlier, and now has up to 500 children as a result.

Literature

 * In the Ciaphas Cain book Traitor's Hand, Governor Tarkus' death causes a succession crisis, due to having no heir. However the crisis was made worse due to him preforming "almost two centuries of energetic fornication".

Tabletop Games

 * Forgotten Realms got the King of Cormyr, Azoun IV, who became rather infamous for this. Quoth his Royal Magician (on seeing too many young nobles with familliar features at once) - "Moderation, my liege?" Also, developers on the game side played up his meme-worthy status and Champions of Valor got "Bastard of Azoun" as an optional regional background - right between having music lessons as a kid and birth attended by a celestial creature (of any deity).

Web Comics

 * Julio Scoundrél from Order of the Stick is heavily implied, if not out right stated to be this.