I'm in the middle of trying to research the Baird family descendants as it pertains to the marriage of Bedent and Mary Harman/Harmon Baird.
In doing so, I'm backtracking some to try and sort out the different generations with the same names (Bedent, Zebulon, etc.)
To answer your question, I have not found any other names for Ezekial and Susannah's children, than the 3 you listed.
Bedent and Mary Baird had 10 children listed in the 1820 census, but I have only 7 listed (6 sons and a daughter)
Their son, Blodgett Baird was in Trigg Co., KY in 1850-1870 and there was a Zebulon Baird/Beard living next to him in 1850. I feel that he was another possible son of Bedent and Mary's.