* "Orphan" can be interpreted broadly. Some characters are technically orphaned, while others are abandoned or raised in poverty with little to no parental influence.
* Dickens often reuses names. This can make it difficult to distinguish between characters.
That being said, here are some notable orphans in Dickens' novels:
Oliver Twist (from *Oliver Twist*)
Pip (from *Great Expectations*)
Little Nell (from *The Old Curiosity Shop*)
Paul Dombey (from *Dombey and Son*)
Esther Summerson (from *Bleak House*)
Little Dorrit (from *Little Dorrit*)
David Copperfield (from *David Copperfield*)
Smike (from *Nicholas Nickleby*)
Sydney Carton (from *A Tale of Two Cities* - while not technically an orphan, he was neglected and abandoned by his father)
These are just a few examples, and other characters could be considered orphans depending on your interpretation.
For more detailed information about each character's background, I recommend consulting a Dickens encyclopedia or researching the individual novels.