yes, you can. If your dad and your cousins mom are brother and sister then you can date your cousins cousin on your cousins dads side.
Actually, cousins CAN date cousins.. but I don't think getting married is an option. In conclusion, cousins can date cousins. Theres nothing wrong with it, its not illegal! So go ahead!
The common ancestor is your parents. Your children and your sister's children are first cousins. Your grandchildren and your sister's grandchildren are second cousins. Your great-grandchildren and your sister's great-grandchildren are third cousins.
Your child and your sister's children are first cousins. Your grandchild and your sister's children are first cousins once removed.
Your child and your sister's daughter are first cousins. Your grand child and your sister's daughter are first cousins, once removed.
Cousins
Sam and his mother's sister's son are first cousins, just as you and Sam are first cousins. But you are not related to Sam's mother's sister's son.
Your sister's daughter and your son are first cousins to each other. Your sister's daughter and your son's daughter are first cousins, once removed to each other. Your son's daughter and your sister's granddaughter are second cousins to each other.
Your mother's sister's children are your 1st cousins.
Your daughter's son's son is your great grandson. Your daughter and your sister's son are first cousins. Your great grandson and your sister's son are first cousins, twice removed. Your great grandson and your sister's great grandchild are third cousins.
Your child and your sister's daughter are first cousins. Your grand child and your sister's daughter are first cousins, once removed.
Your daughter and your sister's child are first cousins. Your daughter and your sister's grandchild are first cousins, once removed.