The name is very unusual today, but there were some very unusual names in the 1800s. At one time I was working cataloguing names and epitaphs from churchyard headstones, in the county of Cheshire, for the County Records Office, and one of the names (for a male person), that I came across was "Faithful" which I thought was lovely. If you want to look for further examples of unusual names, you could try your County Records Office, especially if you know where your grandfather was born you could try the County Records Office for that place. If it was in the 1800s before Census records were made, they also record, marriages, births, and deaths prior to that from Parish Records.