Unfortunately I only have a record from Muskeagh from 1839.
The records were taken in 1827, 1839, 1848, 1850, 1860 and 1868.
In the 1839 record for Muskeagh there is a holding for Richard and John Giddens. The holding was 34 acres, 1 rood and 20 perches, shared equally between both men.
Richard was 78 years old, his wife was 81 and they had 2 sons and a daughter living with them (although there is a note indicating that these were grandchildren, it is a little difficult to read). They also had a male and a female servant.
John was 67 years old, his wife was 69 and they had 2 sons, 2 daughters and a son-in-law living with them.
Both Richard and John were farmers.
I had a quick look at the records for Farnees which is a neighbouring townland, but I wasn't able to find any Giddens/variants there.
Hope this helps,
Shane