Saint Ryan (or Rian or Rhian) apparently is not a patron saint as I find no patronages list for him.
There is no official patron saint of bereavement but there are a number of saints for various death related issue. A list of these can be found by clicking on this link.
See the link below for the Patron Saint Index
For an alphabetical list of the patron saints click here.
There are a number of saints that are patron saints of hospitals but Saint Jude Thaddeus is the only apostle on the list.
Saint Nicholas of Myra is the patron saint of children, scholars and penitent thieves as well as a number of other causes. For a complete list of his patronages, click on this link.
There is no official patron saint of patience. If there were, Saint Monica would probably be at the top of the list.
There are thousands of patron saints, too many to list here. Go to the Patron Saint Index for a fairly comprehensive list.
Click on the link below to the Patron Saint Index for a list of many of the saints.
There is no patron saint of all marine animals. The closest are St. Neot, Patron Saint of Fish; St. Brendan the Navigator, Patron Saint of Whales (along with sailors, mariners, etc.); and St. Kentigern, Patron Saint of Salmon.
Go to the Patron Saint Index (Click this link). From that page you can choose to search under each individual saint's name (Alphabetical List of Saints) or you can click on the Patronage List and view the various patronage topics and patron saints of each. There is also the Calendar of Saints where you can check out each day of the year to see which saints are memorialized on each date. The lists of options are found in the column on the right hand side of the page.
Today the Internet is our primary source of information. However, in the time of Isidore, books were the primary source for knowledge. Isidore was a prolific writer whose works include a dictionary, an encyclopedia, a history of Goths, and a history of the world beginning with creation. So, Isidore is the patron saint of the Internet and computers.