Jeff, as far as I know the Pellegalle family and all of the varies spellings are all related by blood in some fashion.
My great- grandfather is Adrienne "Bud" Pellagalle/Pellegalle, his parents were Augustin Pellegalli and Matilda/Mary Lightell these are my great-greats. Augustin's father was Augustine Pellegal and this is where it gets fuzzy for me, his mother was Cecilia Dinette (Great- great- greats). Then my great- great- great- greats to my knowledge were Augustin Pellegalli and Josephine Andardi.