не поставив в известность(кого-либо • они уже уехали, не поставив нас в известность – unbeknown to us, they had already leftВ.И.Макаров); без чьего-либо ведома(без моего ведома – unbeknown to meAnglophile); кому-либо невдомёк(что); неизвестный(two elderly women unbeknown to anybody – две никому не известные пожилые женщины • gentlemen unbeknown to ladies give their arms to ladies aforesaid, to conduct them into dinner – джентльмены, не известные дамам, подают руку вышеупомянутым дамам, чтобы проводить их на ужин); неве́домый
without that person knowing about it(But unbeknown to Ivor, Stroud had no intention of parting with the money.ldoceonline.com • You've crept back unbeknown to me. • Thus unbeknown to the competitors, the last valid part of the competition was removed four days before the submission date. • Under the old system many women amass secret savings unbeknown to their husbands. • Unbeknown to him, his wife had been trying to phone him all morning. • Unbeknownst to the public, he was involved in covering up the scandal that was to rock the nation. • Unbeknown to me, Denise had her own plan.); If something happens unbeknown to you, you do not know about it(collinsdictionary.com)
ldoceonline.com • You've crept back unbeknown to me. • Thus unbeknown to the competitors, the last valid part of the competition was removed four days before the submission date. • Under the old system many women amass secret savings unbeknown to their husbands. • Unbeknown to him, his wife had been trying to phone him all morning. • Unbeknownst to the public, he was involved in covering up the scandal that was to rock the nation. • Unbeknown to me, Denise had her own plan.); If something happens unbeknown to you, you do not know about it (collinsdictionary.com)