Two daughter's, names have only one syllable difference, born 5 years apart, raised together. I rarely mistake their names.
Me, youngest of 5 with completely different names, born 7 years after my next youngest sibling and raised primarily as an only child for years. I thought my name was a mash of the first syllable of all their names(girls and boys) when my mom would get pissed. She did it ALL THE TIME! Ran it straight down from oldest to youngest.