Boy Name · English Origin
Klaus
Klaus is a boy baby name of English origin, meaning "Pure hearted". It currently sits in the Rare tier of US baby names for 2026, and parents who love Klaus often also consider Kelsi.
Klaus meaning, origin, and usage
Meaning: Pure hearted
Origin: English naming roots help connect Klaus to related English baby names.
Pronunciation: Baby Name Studio pronounces Klaus as K·L·A·U·S, with 5 letters and a boy usage profile.
Popularity: According to Baby Name Studio's 2026 tracker, Klaus is an uncommon, standout choice in the Rare tier.
Klaus variants, nicknames, middle names, and sibling names
- Variants and spelling ideas: Klausa, Klause, Klausy, Klau.
- Nicknames: Kla and K.
- Middle names: Pair Klaus with a middle name that balances its substantial sound; start with the Klaus middle name generator.
- Sibling names: Kelsi, Kelci, Kelsie, Kelsea, Kaleigh — full picks on the sibling names for Klaus guide for a cohesive sibset.
- Similar names: Looking for names that sound like Klaus? Browse our names like Klaus guide for phonetic-neighbor picks.
- Explore more: use the Baby Name Explorer, name search, AI name generator, and Baby Name Studio homepage.
Frequently asked about Klaus
What does the name Klaus mean?
Klaus means "Pure hearted" and is of English origin.
What is the origin of Klaus?
Klaus originates in English naming tradition.
How do you pronounce Klaus?
Klaus has 5 letters and is most commonly stressed on the first syllable.
Is Klaus a boy's or girl's name?
Klaus is primarily used as a boy's name in US records.
How popular is Klaus in 2026?
In our 2026 popularity tracker, Klaus sits in the Rare tier — an uncommon, standout choice.
What names are similar to Klaus?
Names that share Klaus's sound and style include Kelsi, Kelci, Kelsie, Kelsea, Kaleigh.
What middle names pair well with Klaus?
Good middle-name fits for Klaus pair an opposite syllable rhythm: if Klaus is short, lean longer (e.g. classical or three-syllable middles); if Klaus is longer, a one-syllable middle keeps the full name from feeling heavy.
What are good sibling names for Klaus?
Sibling names that pair naturally with Klaus share its rhythm without rhyming — Kelsi, Kelci, Kelsie all sit comfortably alongside it on a shortlist.