It should be noted that the name "Rahin" (رہین) (راء with a fatha, ہاء with a kasrah, and یاء with a sukoon) means "something given as a pledge, subservient, or subordinate." The name "Raaheen" (راہین) is a word without any meaning. As for "Raaheen" (راحین) and "Raheen" (رحین), despite research, no meaning could be found for either.
It is therefore better to choose a name for your children from among those of the Sahabah or the Sahabiyat, may Allah be pleased with them all, or any other name with a good meaning.
Allah the Almighty knows best.
Darul Ifta Al-Ikhlas, Karachi.
مسند البزار: (رقم الحدیث: 8540، 176/15، ط: مكتبة العلوم و الحكم)
عَن أبي هُرَيرة؛ أَنَّ رَسُولَ اللهِ صَلَّى اللَّهُ عَلَيه وَسَلَّم قال: "إن من حق الولد على الوالد أن يحسن اسمه ويحسن أدبه".
فیروزاللغات: (ص: 774، ط: فیروز سنز)
رہین - (رَ- ہین) (ع - وصف) گروی رکھی ہوئی چیز، تابع، ما تحت۔