How did you know?

Ladies who waited last minute or right after birth to name their son... how did you know the name was right? I like no boy names. I’m scared I’ll never have a name we like and we’ll have to settle for less. We’re looking for a unique name that is beautiful and earthy. We live on an island and are surrounded by water. We want something to correlate to that. Any advice, stories etc is extremely helpful. Thank you!