Dominic
Dean
Dexter
Drew
Dawson
Derrick
Dustin
Duncan
Daylynne (girl) and Deacon (Boy)
Kaleb / Kaylee
Dominic/ Dominique
Daniel/ Dana or Diana
Devin/ Destiny
David or Dustin / Desirae
Daren
Damon
Dominic (this is my cousins name)
Duncan
Dirk
Deacon
Devon
Drake
Donald/Donnie
Dean
Dylan
That's all I got off the top of my head but there's loads of baby name websites where you can search by gender and letter. Just google baby name generator
Devin
Derrick
David
Daniel
Dillan
Dolton
Any other boy/girl names will be appreciated to even if it didn't start with a D