Of course there are variations of the spelling of the family name. There are Irish Desparts, sometimes this is because of the - literacy ability of either the family or the scribe inputting the information as they heard it!
Hence Despar - Despars - Despart - Despard. Jean Baptiste Georges Despart emigrated from France (no actual evidence just family story) to the Quebec area around 1750. The name changes gradually to Despard.