Halloran asili. Kutoka kwa Kiayalandi Ó h Almhuráin maana yake "mzao wa Allmhurán". Jina lililoitwa Allmhurán linamaanisha "mgeni kutoka ng'ambo ya bahari". Pata Halloran asili.
Majina ya jina la Klaes katika nchi tofauti na lugha tofauti: Cai, Caj, Claes, Claus, Col, Colin, Collin, Kai, Kaj, Kay, Klaas, Klaos, Klas, Klaus, Kolos, Miklavž, Miklós, Mikołaj, Mikoláš, Miksa, Mikula, Mikuláš, Mykola, Neacel, Neculai, Nels, Nic, Niccolò, Nichol, Nicholas, Niĉjo, Nick, Nickolas, Nickolaus, Nicky, Nico, Nicol, Nicola, Nicolás, Nicolaas, Nicolae, Nicolao, Nicolaos, Nicolas, Nicolau, Nicolaus, Nicolò, Nicu, Nicușor, Niek, Niels, Nigul, Niilo, Nik, Nika, Niklas, Niklaus, Niko, Nikola, Nikolaas, Nikolai, Nikolaj, Nikolajs, Nikolao, Nikolaos, Nikolas, Nikolaus, Nikolay, Nikoloz, Nikora, Nikusha, Nils, Nioclás. Pata Klaes kwa lugha zingine.
Majina ya kawaida yenye jina la mwisho Halloran: Gemma, Latanya, German, Tameika, Nicky, Germán. Pata Majina yanayotembea na Halloran.