Yvonne
I have also encountered numerous spellings of the name making it very hard to link families. I have have only found 2 generations of my Iddeson ancestors although I have found a lot of variants that I can not connect.
My ancestors were Mary Iddeson (1767-1832) later Mrs John Hutchinson and her father George Iddeson who died in 1791. George who was married twice, or more probably 3 times was survived by descendants who can be found at Kirkby Malzeard in the early 19thC. Mary, my ancestor was the only child from his first marriage - it appears her mother must have died near the time of her birth as the burial and baptism occur on the same day.
There were Iddesons at Kirkby Malzeard in the 17th and early 18th C. The most recent of these are baptisms in the 1720s/30s but then nothing else of the Iddeson family until George settled there.
George was married at Ripley near Harrogate in 1765 where the marriage in the parish register is recorded as between George Edeson and Mary Richardson. There was a well established Edeson family who lived at Clint in the parish of Ripley which has been researched by a few people. They were there throughout the 17thC. In the 19thC members of this family moved to Knaresborough whereon they became Eteson.
I have exchanged some information with a few people who have been researching the Ideson family who lived in the Bolton Abbey area. Again the spelling is various and includes Eedson.
There was also a family at Ripon where the name was usually spelt Eedson and Eedon.
I have also looked at the Armley area near Leeds as a descendant of George Iddeson was living there according to the 1851 census using a slightly different spelling of the surname. There were Eddisons at Armley in the 18thC and I did think this might have been where George originated, but although there were baptisms for children named George Eddison at the correct time, they do not link.
Do e-mail me directly if you want to exchange more information.
Regards,
Geoff.