Ok, here is my Hillsborough ONLY Seminole League. 2 divisions, 6 teams each.
Modified Hillsborough Only Seminole League
North Division
Lutz - could act as Steinbrenner HS
Temple Terrace - could act as King HS
Carrollwood - could act as Gaither HS
Citrus Park - Could act as Sickles HS
Town and Country - could act as Middleton HS
Westchase - could act as Alonso HS
South Division
Brandon - Brandon HS
Ybor City - Blake HS
Palma Ceia - Plant HS
Bayshore - Tampa Catholic HS
MacDill - Robinson HS
Valrico - Durant HS
You don't even need to use HS names to be honest. Using the city names is cool too. If you were going to use HS names for mascots, that works too. It's your dynasty, you do what you want. I just like reading about local stuff - even if it is fictional lol.
Here is a logo for Tampa Catholic