Xaliimo
Xaliimo is the Somali orthographic and spoken form of the Arabic name Ḥalīmah; it is used within Somali language and culture.
It carries the meaning 'gentle, mild, patient, forbearing', preserved from the Arabic root ḥ-l-m.
Yes; Ḥalīmah al-Saʿdiyyah, the Prophet Muḥammad's foster-mother, is a historically attested bearer of the Arabic form of the name.
In Somali the initial 'X' denotes a voiceless pharyngeal/velar fricative similar to Arabic ḥ or kh; approximate English rendering is 'KHA-lii-moh'.
It is relatively common within Somali communities but rare outside the Horn of Africa, which may make it feel uncommon internationally.