Custodian is a word with weight in Swiss finance, where custody of client assets is a core service of private banks and trust companies. Prefixed with crypto, it describes the same discipline applied to keys and coins. The compound is short enough for a letterhead and specific enough for a compliance department's research. The .ch ending tells clients the custodian operates from Switzerland, a location many associate with stability and discretion.
Within the Wallet & Storage collection the name addresses the Swiss custody market directly. It fits a custody subsidiary of a bank, an independent provider serving external asset managers, a trust company holding bitcoin for foundations and families, or a technology firm supplying custody infrastructure to other institutions. It also works as a neutral umbrella name for a consortium of Swiss service providers.