How long were there still Registered Whigs?

[Thunderbird is the word]

I was just thinking, could there have still been registered Whigs on the voter roles into the twentieth century. Someone born in the 1830s who first registered to vote in the 1850s and lived to an old age. I wonder if looking at archived voter roles from the 1910s or 20s you'd still find the odd septegenerian Whig.