I need advice on my characters' names. Do they sound ok?

Do these names flow well? Spenser Gonzalez, Sabrina Johnson, Tristan Riddle, Joshua Mendez, Sara Gonzalez, Jonanthan Greene, Daniel Rimirez, Danielle Jackson, Chace Meadows, Ricardo Rimirez, Abbigail Johnson, Samantha Johnson, Robert and Angela Woodman, Zac Woodman, Cynthia Gonzalez, Barbara Gonzalez, John Thomas, Brianda and Julian Mendez, Linda and Evan Riddle, and Terrence Riddle. Also, any suggestions for middle names would be great too. Thanks, -msar27