Patron saints against neurological or nerve diseases are St. Bartholomew the Apostle and St. Dymphna. There is no particular patron for those who suffer from Parkinsons. However, Pope John Paul II suffered from it and would be a perfect person to pray to even though he is not yet canonized and not a patron saint.
Multiple sclerosis
St. Peregrine. He was cured of cancer, after he received a vision of Christ on the cross reaching out His hand to touch his impaired limb. He died in 1345 and was canonized in 1726. He is the patron of cancer patients.
There are multiple saints named Jeanne, but one commonly associated with the name is Saint Joan of Arc. She is the patron saint of France, soldiers, prisoners, and people ridiculed for their faith.
The Patron Saint Inex lists no patron saints of bears.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
Saint Lillian is not a patron saint as per the Patron Saint Index.
There is a patron saint of Wales but no patron saint of whales.
There is no patron saint of voting.
There is no patron saint of color.
There is no patron saint of red heads as per the Patron Saint Index.
As per the Patron Saint Index, Saint Cedd is not a patron saint at this time.